28077664 has 24 divisors (see below), whose sum is σ = 57682800. Its totient is φ = 13428096.

The previous prime is 28077653. The next prime is 28077677. The reversal of 28077664 is 46677082.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 18339 + ... + 19810.

It is an arithmetic number, because the mean of its divisors is an integer number (2403450).

Almost surely, 2^28077664 is an apocalyptic number.

It is an amenable number.

28077664 is an abundant number, since it is smaller than the sum of its proper divisors (29605136).

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

28077664 is a wasteful number, since it uses less digits than its factorization.

28077664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38182 (or 38174 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 28077664 is about 5298.8360986164. The cubic root of 28077664 is about 303.9393923498.

The spelling of 28077664 in words is "twenty-eight million, seventy-seven thousand, six hundred sixty-four".