28306884 has 24 divisors (see below), whose sum is σ = 69526240. Its totient is φ = 8938944.

The previous prime is 28306879. The next prime is 28306891. The reversal of 28306884 is 48860382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61849 + ... + 62304.

Almost surely, 2^28306884 is an apocalyptic number.

It is an amenable number.

28306884 is an abundant number, since it is smaller than the sum of its proper divisors (41219356).

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

28306884 is a wasteful number, since it uses less digits than its factorization.

28306884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124179 (or 124177 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28306884 is about 5320.4214118808. The cubic root of 28306884 is about 304.7642503245.

The spelling of 28306884 in words is "twenty-eight million, three hundred six thousand, eight hundred eighty-four".