28672884 has 36 divisors (see below), whose sum is σ = 72770880. Its totient is φ = 9519120.

The previous prime is 28672877. The next prime is 28672901. The reversal of 28672884 is 48827682.

It is a happy number.

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

It is a congruent number.

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, 8287 + ... + 11225.

Almost surely, 2^28672884 is an apocalyptic number.

It is an amenable number.

28672884 is an abundant number, since it is smaller than the sum of its proper divisors (44097996).

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

28672884 is a wasteful number, since it uses less digits than its factorization.

28672884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220 (or 3215 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 28672884 is about 5354.7067146577. The cubic root of 28672884 is about 306.0721347305.

The spelling of 28672884 in words is "twenty-eight million, six hundred seventy-two thousand, eight hundred eighty-four".