28562690 has 24 divisors (see below), whose sum is σ = 55675188. Its totient is φ = 10545600.

The previous prime is 28562683. The next prime is 28562731. The reversal of 28562690 is 9626582.

It can be written as a sum of positive squares in 6 ways, for example, as 12103441 + 16459249 = 3479^2 + 4057^2 .

It is a super-2 number, since 2×28562690² = 1631654520072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6761 + ... + 10140.

Almost surely, 2^28562690 is an apocalyptic number.

28562690 is a deficient number, since it is larger than the sum of its proper divisors (27112498).

28562690 is a wasteful number, since it uses less digits than its factorization.

28562690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934 (or 16921 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 28562690 is about 5344.4073572287. The cubic root of 28562690 is about 305.6795383481.

The spelling of 28562690 in words is "twenty-eight million, five hundred sixty-two thousand, six hundred ninety".