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30788100621 = 336186321661
BaseRepresentation
bin11100101011000111…
…010010001000001101
32221110200020120012000
4130223013102020031
51001023223204441
622051023502513
72136646352205
oct345307221015
987420216160
1030788100621
111206a097763
125b72a57a39
132b9873ca25
1416c0d97405
15c02e002b6
hex72b1d220d

30788100621 has 32 divisors (see below), whose sum is σ = 46415600640. Its totient is φ = 20164593600.

The previous prime is 30788100617. The next prime is 30788100661. The reversal of 30788100621 is 12600188703.

It is not a de Polignac number, because 30788100621 - 22 = 30788100617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30788100661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1410531 + ... + 1432191.

It is an arithmetic number, because the mean of its divisors is an integer number (1450487520).

Almost surely, 230788100621 is an apocalyptic number.

It is an amenable number.

30788100621 is a deficient number, since it is larger than the sum of its proper divisors (15627500019).

30788100621 is a wasteful number, since it uses less digits than its factorization.

30788100621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22594 (or 22588 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 30788100621 in words is "thirty billion, seven hundred eighty-eight million, one hundred thousand, six hundred twenty-one".

Divisors: 1 3 9 27 61 183 549 863 1647 2589 7767 21661 23301 52643 64983 157929 194949 473787 584847 1321321 1421361 3963963 11891889 18693443 35675667 56080329 168240987 504722961 1140300023 3420900069 10262700207 30788100621