28504488 has 16 divisors (see below), whose sum is σ = 71261280. Its totient is φ = 9501488.

The previous prime is 28504459. The next prime is 28504499. The reversal of 28504488 is 88440582.

It is a super-2 number, since 2×28504488² = 1625011672284288, which contains 22 as substring.

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, 593820 + ... + 593867.

It is an arithmetic number, because the mean of its divisors is an integer number (4453830).

Almost surely, 2^28504488 is an apocalyptic number.

It is an amenable number.

28504488 is an abundant number, since it is smaller than the sum of its proper divisors (42756792).

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

28504488 is a wasteful number, since it uses less digits than its factorization.

28504488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187696 (or 1187692 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 28504488 is about 5338.9594491811. The cubic root of 28504488 is about 305.4717701197.

The spelling of 28504488 in words is "twenty-eight million, five hundred four thousand, four hundred eighty-eight".