30081032856 has 160 divisors (see below), whose sum is σ = 98894151840. Its totient is φ = 8362248192.

The previous prime is 30081032851. The next prime is 30081032879. The reversal of 30081032856 is 65823018003.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30081032856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30081032851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 78216 + ... + 257448.

It is an arithmetic number, because the mean of its divisors is an integer number (618088449).

Almost surely, 2^30081032856 is an apocalyptic number.

30081032856 is a gapful number since it is divisible by the number (36) 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 30081032856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49447075920).

30081032856 is an abundant number, since it is smaller than the sum of its proper divisors (68813118984).

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

30081032856 is a wasteful number, since it uses less digits than its factorization.

30081032856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179295 (or 179282 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 30081032856 in words is "thirty billion, eighty-one million, thirty-two thousand, eight hundred fifty-six".