28164528 has 60 divisors (see below), whose sum is σ = 90085008. Its totient is φ = 8046720.

The previous prime is 28164509. The next prime is 28164533. The reversal of 28164528 is 82546182.

28164528 is a `hidden beast` number, since 2 + 8 + 1 + 645 + 2 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 28164492 and 28164501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12963 + ... + 14978.

Almost surely, 2^28164528 is an apocalyptic number.

28164528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28164528 is an abundant number, since it is smaller than the sum of its proper divisors (61920480).

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

28164528 is a wasteful number, since it uses less digits than its factorization.

28164528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27962 (or 27953 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28164528 is about 5307.0262859722. The cubic root of 28164528 is about 304.2525025862.

The spelling of 28164528 in words is "twenty-eight million, one hundred sixty-four thousand, five hundred twenty-eight".