30881981040 has 160 divisors (see below), whose sum is σ = 102107304000. Its totient is φ = 7694057472.

The previous prime is 30881981033. The next prime is 30881981059. The reversal of 30881981040 is 4018918803.

It is a junction number, because it is equal to n+sod(n) for n = 30881980983 and 30881981001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531336 + ... + 586584.

It is an arithmetic number, because the mean of its divisors is an integer number (638170650).

Almost surely, 2^30881981040 is an apocalyptic number.

30881981040 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 30881981040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51053652000).

30881981040 is an abundant number, since it is smaller than the sum of its proper divisors (71225322960).

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

30881981040 is a wasteful number, since it uses less digits than its factorization.

30881981040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55419 (or 55413 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 30881981040 in words is "thirty billion, eight hundred eighty-one million, nine hundred eighty-one thousand, forty".