28633872 has 40 divisors (see below), whose sum is σ = 75696544. Its totient is φ = 9321984.

The previous prime is 28633853. The next prime is 28633877. The reversal of 28633872 is 27833682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28633872.

It is not an unprimeable number, because it can be changed into a prime (28633877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873 + ... + 9000.

Almost surely, 2^28633872 is an apocalyptic number.

It is an amenable number.

28633872 is an abundant number, since it is smaller than the sum of its proper divisors (47062672).

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

28633872 is a wasteful number, since it uses less digits than its factorization.

28633872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13927 (or 13921 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 28633872 is about 5351.0626981937. The cubic root of 28633872 is about 305.9332589716.

The spelling of 28633872 in words is "twenty-eight million, six hundred thirty-three thousand, eight hundred seventy-two".