30740856 has 16 divisors (see below), whose sum is σ = 76852200. Its totient is φ = 10246944.

The previous prime is 30740851. The next prime is 30740869. The reversal of 30740856 is 65804703.

It is a super-2 number, since 2×30740856² = 1890000455225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30740851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640411 + ... + 640458.

Almost surely, 2^30740856 is an apocalyptic number.

It is an amenable number.

30740856 is an abundant number, since it is smaller than the sum of its proper divisors (46111344).

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

30740856 is a wasteful number, since it uses less digits than its factorization.

30740856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280878 (or 1280874 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 30740856 is about 5544.4437051881. The cubic root of 30740856 is about 313.2602706766.

The spelling of 30740856 in words is "thirty million, seven hundred forty thousand, eight hundred fifty-six".