28474164 has 36 divisors (see below), whose sum is σ = 73925124. Its totient is φ = 9234432.

The previous prime is 28474163. The next prime is 28474169. The reversal of 28474164 is 46147482.

28474164 is a `hidden beast` number, since 28 + 474 + 164 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13264164 + 15210000 = 3642^2 + 3900^2 .

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (28474163) 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, 9357 + ... + 12020.

Almost surely, 2^28474164 is an apocalyptic number.

It is an amenable number.

28474164 is an abundant number, since it is smaller than the sum of its proper divisors (45450960).

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

28474164 is a wasteful number, since it uses less digits than its factorization.

28474164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21424 (or 21419 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28474164 is about 5336.1188142694. The cubic root of 28474164 is about 305.3634080879.

The spelling of 28474164 in words is "twenty-eight million, four hundred seventy-four thousand, one hundred sixty-four".