30931390000 has 100 divisors (see below), whose sum is σ = 85586466064. Its totient is φ = 10605024000.

The previous prime is 30931389997. The next prime is 30931390003. The reversal of 30931390000 is 9313903.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30931389997) and next prime (30931390003).

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (30931390003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 150939 + ... + 290938.

Almost surely, 2^30931390000 is an apocalyptic number.

It is an amenable number.

30931390000 is an abundant number, since it is smaller than the sum of its proper divisors (54655076064).

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

30931390000 is an equidigital number, since it uses as much as digits as its factorization.

30931390000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441912 (or 441891 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 28.

The spelling of 30931390000 in words is "thirty billion, nine hundred thirty-one million, three hundred ninety thousand".