28396564 has 24 divisors (see below), whose sum is σ = 59783360. Its totient is φ = 11529216.

The previous prime is 28396519. The next prime is 28396567. The reversal of 28396564 is 46569382.

It is a self number, because there is not a number n which added to its sum of digits gives 28396564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396567) 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, 26157 + ... + 27220.

Almost surely, 2^28396564 is an apocalyptic number.

It is an amenable number.

28396564 is an abundant number, since it is smaller than the sum of its proper divisors (31386796).

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

28396564 is a wasteful number, since it uses less digits than its factorization.

28396564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53407 (or 53405 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 28396564 is about 5328.8426510829. The cubic root of 28396564 is about 305.0857556944.

The spelling of 28396564 in words is "twenty-eight million, three hundred ninety-six thousand, five hundred sixty-four".