28767664 has 20 divisors (see below), whose sum is σ = 58161456. Its totient is φ = 13758272.

The previous prime is 28767649. The next prime is 28767677. The reversal of 28767664 is 46676782.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 38719 + ... + 39454.

Almost surely, 2^28767664 is an apocalyptic number.

It is an amenable number.

28767664 is an abundant number, since it is smaller than the sum of its proper divisors (29393792).

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

28767664 is a wasteful number, since it uses less digits than its factorization.

28767664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78204 (or 78198 counting only the distinct ones).

The product of its digits is 677376, while the sum is 46.

The square root of 28767664 is about 5363.5495709465. The cubic root of 28767664 is about 306.4090106356.

The spelling of 28767664 in words is "twenty-eight million, seven hundred sixty-seven thousand, six hundred sixty-four".