28130884 has 12 divisors (see below), whose sum is σ = 49412608. Its totient is φ = 14013000.

The previous prime is 28130867. The next prime is 28130891. The reversal of 28130884 is 48803182.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 11892 + ... + 14059.

Almost surely, 2^28130884 is an apocalyptic number.

It is an amenable number.

28130884 is a deficient number, since it is larger than the sum of its proper divisors (21281724).

28130884 is a wasteful number, since it uses less digits than its factorization.

28130884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26226 (or 26224 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28130884 is about 5303.8555787276. The cubic root of 28130884 is about 304.1313058119.

The spelling of 28130884 in words is "twenty-eight million, one hundred thirty thousand, eight hundred eighty-four".