28164636 has 36 divisors (see below), whose sum is σ = 71408064. Its totient is φ = 9360000.

The previous prime is 28164599. The next prime is 28164637. The reversal of 28164636 is 63646182.

28164636 is a `hidden beast` number, since 2 + 8 + 1 + 646 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28164636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13461 + ... + 15411.

Almost surely, 2^28164636 is an apocalyptic number.

It is an amenable number.

28164636 is an abundant number, since it is smaller than the sum of its proper divisors (43243428).

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

28164636 is a wasteful number, since it uses less digits than its factorization.

28164636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2357 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28164636 is about 5307.0364611523. The cubic root of 28164636 is about 304.2528914823.

The spelling of 28164636 in words is "twenty-eight million, one hundred sixty-four thousand, six hundred thirty-six".