28566930 has 32 divisors (see below), whose sum is σ = 78355584. Its totient is φ = 6529536.

The previous prime is 28566907. The next prime is 28566931. The reversal of 28566930 is 3966582.

It is not an unprimeable number, because it can be changed into a prime (28566931) 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, 67807 + ... + 68226.

It is an arithmetic number, because the mean of its divisors is an integer number (2448612).

Almost surely, 2^28566930 is an apocalyptic number.

28566930 is an abundant number, since it is smaller than the sum of its proper divisors (49788654).

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

28566930 is a wasteful number, since it uses less digits than its factorization.

28566930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136050.

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

The square root of 28566930 is about 5344.8040188579. The cubic root of 28566930 is about 305.6946631737.

The spelling of 28566930 in words is "twenty-eight million, five hundred sixty-six thousand, nine hundred thirty".