28827564 has 12 divisors (see below), whose sum is σ = 67264344. Its totient is φ = 9609184.

The previous prime is 28827553. The next prime is 28827571. The reversal of 28827564 is 46572882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1201137 + ... + 1201160.

It is an arithmetic number, because the mean of its divisors is an integer number (5605362).

Almost surely, 2^28827564 is an apocalyptic number.

It is an amenable number.

28827564 is an abundant number, since it is smaller than the sum of its proper divisors (38436780).

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

28827564 is a wasteful number, since it uses less digits than its factorization.

28827564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402304 (or 2402302 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 28827564 is about 5369.1306558883. The cubic root of 28827564 is about 306.6215313745.

The spelling of 28827564 in words is "twenty-eight million, eight hundred twenty-seven thousand, five hundred sixty-four".