30931712 has 72 divisors (see below), whose sum is σ = 72455712. Its totient is φ = 12902400.

The previous prime is 30931699. The next prime is 30931727. The reversal of 30931712 is 21713903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73262 + ... + 73682.

Almost surely, 2^30931712 is an apocalyptic number.

30931712 is a gapful number since it is divisible by the number (32) 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 30931712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36227856).

30931712 is an abundant number, since it is smaller than the sum of its proper divisors (41524000).

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

30931712 is an equidigital number, since it uses as much as digits as its factorization.

30931712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 30931712 is about 5561.6285384768. The cubic root of 30931712 is about 313.9072304954.

The spelling of 30931712 in words is "thirty million, nine hundred thirty-one thousand, seven hundred twelve".