30977929920 has 224 divisors, whose sum is σ = 116282419200. Its totient is φ = 6836465664.

The previous prime is 30977929909. The next prime is 30977929951. The reversal of 30977929920 is 2992977903.

It is a tau number, because it is divible by the number of its divisors (224).

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, 115401 + ... + 274359.

Almost surely, 2^30977929920 is an apocalyptic number.

30977929920 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 30977929920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58141209600).

30977929920 is an abundant number, since it is smaller than the sum of its proper divisors (85304489280).

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

30977929920 is a wasteful number, since it uses less digits than its factorization.

30977929920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159015 (or 159005 counting only the distinct ones).

The product of its (nonzero) digits is 3857868, while the sum is 57.

The spelling of 30977929920 in words is "thirty billion, nine hundred seventy-seven million, nine hundred twenty-nine thousand, nine hundred twenty".