28026864 has 40 divisors (see below), whose sum is σ = 80448720. Its totient is φ = 9342144.

The previous prime is 28026853. The next prime is 28026893. The reversal of 28026864 is 46862082.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32007 + ... + 32870.

It is an arithmetic number, because the mean of its divisors is an integer number (2011218).

Almost surely, 2^28026864 is an apocalyptic number.

28026864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28026864 is an abundant number, since it is smaller than the sum of its proper divisors (52421856).

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

28026864 is a wasteful number, since it uses less digits than its factorization.

28026864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64894 (or 64882 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28026864 is about 5294.0404229662. The cubic root of 28026864 is about 303.7559791538.

The spelling of 28026864 in words is "twenty-eight million, twenty-six thousand, eight hundred sixty-four".