30968256 has 168 divisors, whose sum is σ = 95130112. Its totient is φ = 8870400.

The previous prime is 30968221. The next prime is 30968257. The reversal of 30968256 is 65286903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30968257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720171 + ... + 720213.

Almost surely, 2^30968256 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 30968256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47565056).

30968256 is an abundant number, since it is smaller than the sum of its proper divisors (64161856).

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

30968256 is a wasteful number, since it uses less digits than its factorization.

30968256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 30968256 is about 5564.9129373244. The cubic root of 30968256 is about 314.0308028256.

The spelling of 30968256 in words is "thirty million, nine hundred sixty-eight thousand, two hundred fifty-six".