30939400320 has 128 divisors (see below), whose sum is σ = 101024945280. Its totient is φ = 8049254400.

The previous prime is 30939400277. The next prime is 30939400321. The reversal of 30939400320 is 2300493903.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×30939400320² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30939400321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117796 + ... + 275235.

It is an arithmetic number, because the mean of its divisors is an integer number (789257385).

Almost surely, 2^30939400320 is an apocalyptic number.

30939400320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30939400320 is an abundant number, since it is smaller than the sum of its proper divisors (70085544960).

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

30939400320 is a wasteful number, since it uses less digits than its factorization.

30939400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393094 (or 393082 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 33.

The spelling of 30939400320 in words is "thirty billion, nine hundred thirty-nine million, four hundred thousand, three hundred twenty".