28764544 has 32 divisors (see below), whose sum is σ = 60679800. Its totient is φ = 13535232.

The previous prime is 28764529. The next prime is 28764551. The reversal of 28764544 is 44546782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 28764497 and 28764506.

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, 4434 + ... + 8785.

Almost surely, 2^28764544 is an apocalyptic number.

It is an amenable number.

28764544 is an abundant number, since it is smaller than the sum of its proper divisors (31915256).

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

28764544 is a wasteful number, since it uses less digits than its factorization.

28764544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250 (or 13238 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 28764544 is about 5363.2587108958. The cubic root of 28764544 is about 306.3979330281.

The spelling of 28764544 in words is "twenty-eight million, seven hundred sixty-four thousand, five hundred forty-four".