28522664 has 8 divisors (see below), whose sum is σ = 53480010. Its totient is φ = 14261328.

The previous prime is 28522649. The next prime is 28522673. The reversal of 28522664 is 46622582.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 11957764 = 4070^2 + 3458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782659 + ... + 1782674.

Almost surely, 2^28522664 is an apocalyptic number.

It is an amenable number.

28522664 is a deficient number, since it is larger than the sum of its proper divisors (24957346).

28522664 is a wasteful number, since it uses less digits than its factorization.

28522664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565339 (or 3565335 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 28522664 is about 5340.6613822634. The cubic root of 28522664 is about 305.5366847532.

The spelling of 28522664 in words is "twenty-eight million, five hundred twenty-two thousand, six hundred sixty-four".