30828560 has 40 divisors (see below), whose sum is σ = 81917376. Its totient is φ = 10569600.

The previous prime is 30828541. The next prime is 30828593. The reversal of 30828560 is 6582803.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30828560² = 1900800223347200, which contains 22 as substring.

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, 26966 + ... + 28085.

Almost surely, 2^30828560 is an apocalyptic number.

It is an amenable number.

30828560 is an abundant number, since it is smaller than the sum of its proper divisors (51088816).

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

30828560 is a wasteful number, since it uses less digits than its factorization.

30828560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55071 (or 55065 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 30828560 is about 5552.3472513884. The cubic root of 30828560 is about 313.5578994746.

The spelling of 30828560 in words is "thirty million, eight hundred twenty-eight thousand, five hundred sixty".