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30291196780 = 22513317195227
BaseRepresentation
bin11100001101011111…
…101111101101101100
32220012001020020021001
4130031133233231230
5444014021244110
621525433250044
72121433632025
oct341537575554
986161206231
1030291196780
1111934655529
125a54563924
132b197ccca0
141674da9c4c
15bc449963a
hex70d7efb6c

30291196780 has 96 divisors (see below), whose sum is σ = 70826434560. Its totient is φ = 10806531840.

The previous prime is 30291196729. The next prime is 30291196799. The reversal of 30291196780 is 8769119203.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30291196780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5792527 + ... + 5797753.

It is an arithmetic number, because the mean of its divisors is an integer number (737775360).

Almost surely, 230291196780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30291196780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35413217280).

30291196780 is an abundant number, since it is smaller than the sum of its proper divisors (40535237780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30291196780 is a wasteful number, since it uses less digits than its factorization.

30291196780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 30291196780 in words is "thirty billion, two hundred ninety-one million, one hundred ninety-six thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 13 20 26 31 52 62 65 124 130 155 260 310 403 620 719 806 1438 1612 2015 2876 3595 4030 5227 7190 8060 9347 10454 14380 18694 20908 22289 26135 37388 44578 46735 52270 67951 89156 93470 104540 111445 135902 162037 186940 222890 271804 289757 324074 339755 445780 579514 648148 679510 810185 1159028 1359020 1448785 1620370 2106481 2897570 3240740 3758213 4212962 5795140 7516426 8425924 10532405 15032852 18791065 21064810 37582130 42129620 48856769 75164260 97713538 116504603 195427076 233009206 244283845 466018412 488567690 582523015 977135380 1165046030 1514559839 2330092060 3029119678 6058239356 7572799195 15145598390 30291196780