Search a number
-
+
30722285880 = 23355111323312
BaseRepresentation
bin11100100111001100…
…001110000100111000
32221022002101211100000
4130213030032010320
51000404401122010
622040313113000
72135220056406
oct344714160470
987262354300
1030722285880
1112035a25110
125b549b8760
132b87c081b0
1416b6344476
15bec24e7c0
hex72730e138

30722285880 has 1152 divisors, whose sum is σ = 131163701760. Its totient is φ = 6363878400.

The previous prime is 30722285833. The next prime is 30722285899. The reversal of 30722285880 is 8858222703.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 991041465 + ... + 991041495.

It is an arithmetic number, because the mean of its divisors is an integer number (113857380).

Almost surely, 230722285880 is an apocalyptic number.

30722285880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30722285880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65581850880).

30722285880 is an abundant number, since it is smaller than the sum of its proper divisors (100441415880).

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

30722285880 is a wasteful number, since it uses less digits than its factorization.

30722285880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 30722285880 in words is "thirty billion, seven hundred twenty-two million, two hundred eighty-five thousand, eight hundred eighty".