28564032 has 112 divisors (see below), whose sum is σ = 88221312. Its totient is φ = 7987200.

The previous prime is 28564031. The next prime is 28564057. The reversal of 28564032 is 23046582.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (28564031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71032 + ... + 71432.

Almost surely, 2^28564032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28564032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44110656).

28564032 is an abundant number, since it is smaller than the sum of its proper divisors (59657280).

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

28564032 is a wasteful number, since it uses less digits than its factorization.

28564032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28564032 is about 5344.5329075608. The cubic root of 28564032 is about 305.6843256600.

The spelling of 28564032 in words is "twenty-eight million, five hundred sixty-four thousand, thirty-two".