30997933240 has 64 divisors (see below), whose sum is σ = 71947136160. Its totient is φ = 12013816320.

The previous prime is 30997933201. The next prime is 30997933243. The reversal of 30997933240 is 4233979903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30997933243) 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, 68674 + ... + 258286.

Almost surely, 2^30997933240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30997933240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35973568080).

30997933240 is an abundant number, since it is smaller than the sum of its proper divisors (40949202920).

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

30997933240 is a wasteful number, since it uses less digits than its factorization.

30997933240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189752 (or 189748 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 49.

The spelling of 30997933240 in words is "thirty billion, nine hundred ninety-seven million, nine hundred thirty-three thousand, two hundred forty".