28032984 has 48 divisors (see below), whose sum is σ = 86770320. Its totient is φ = 8009280.

The previous prime is 28032973. The next prime is 28033007. The reversal of 28032984 is 48923082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27307 + ... + 28314.

It is an arithmetic number, because the mean of its divisors is an integer number (1807715).

Almost surely, 2^28032984 is an apocalyptic number.

28032984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28032984 is an abundant number, since it is smaller than the sum of its proper divisors (58737336).

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

28032984 is a wasteful number, since it uses less digits than its factorization.

28032984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55640 (or 55633 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28032984 is about 5294.6183998472. The cubic root of 28032984 is about 303.7780871249.

The spelling of 28032984 in words is "twenty-eight million, thirty-two thousand, nine hundred eighty-four".