28569136 has 20 divisors (see below), whose sum is σ = 55463464. Its totient is φ = 14256000.

The previous prime is 28569131. The next prime is 28569161. The reversal of 28569136 is 63196582.

It is not an unprimeable number, because it can be changed into a prime (28569131) 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, 8131 + ... + 11101.

Almost surely, 2^28569136 is an apocalyptic number.

It is an amenable number.

28569136 is a deficient number, since it is larger than the sum of its proper divisors (26894328).

28569136 is a wasteful number, since it uses less digits than its factorization.

28569136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 3574 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 28569136 is about 5345.0103835259. The cubic root of 28569136 is about 305.7025317717.

The spelling of 28569136 in words is "twenty-eight million, five hundred sixty-nine thousand, one hundred thirty-six".