28561332 has 24 divisors (see below), whose sum is σ = 70151200. Its totient is φ = 9019296.

The previous prime is 28561327. The next prime is 28561387. The reversal of 28561332 is 23316582.

It is a super-2 number, since 2×28561332² = 1631499371228448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28561332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62407 + ... + 62862.

Almost surely, 2^28561332 is an apocalyptic number.

It is an amenable number.

28561332 is an abundant number, since it is smaller than the sum of its proper divisors (41589868).

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

28561332 is a wasteful number, since it uses less digits than its factorization.

28561332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125295 (or 125293 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 28561332 is about 5344.2803070198. The cubic root of 28561332 is about 305.6746938068.

The spelling of 28561332 in words is "twenty-eight million, five hundred sixty-one thousand, three hundred thirty-two".