28764684 has 36 divisors (see below), whose sum is σ = 78305136. Its totient is φ = 8850528.

The previous prime is 28764677. The next prime is 28764709. The reversal of 28764684 is 48646782.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30264 + ... + 31199.

Almost surely, 2^28764684 is an apocalyptic number.

It is an amenable number.

28764684 is an abundant number, since it is smaller than the sum of its proper divisors (49540452).

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

28764684 is a wasteful number, since it uses less digits than its factorization.

28764684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61486 (or 61481 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 28764684 is about 5363.2717626464. The cubic root of 28764684 is about 306.3984301174.

The spelling of 28764684 in words is "twenty-eight million, seven hundred sixty-four thousand, six hundred eighty-four".