28649136 has 20 divisors (see below), whose sum is σ = 74010392. Its totient is φ = 9549696.

The previous prime is 28649123. The next prime is 28649147. The reversal of 28649136 is 63194682.

It is a junction number, because it is equal to n+sod(n) for n = 28649094 and 28649103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298381 + ... + 298476.

Almost surely, 2^28649136 is an apocalyptic number.

It is an amenable number.

28649136 is an abundant number, since it is smaller than the sum of its proper divisors (45361256).

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

28649136 is a wasteful number, since it uses less digits than its factorization.

28649136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596868 (or 596862 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 28649136 is about 5352.4887669196. The cubic root of 28649136 is about 305.9876111008.

The spelling of 28649136 in words is "twenty-eight million, six hundred forty-nine thousand, one hundred thirty-six".