28641164 has 24 divisors (see below), whose sum is σ = 52496640. Its totient is φ = 13646864.

The previous prime is 28641161. The next prime is 28641169. The reversal of 28641164 is 46114682.

It is a self number, because there is not a number n which added to its sum of digits gives 28641164.

It is not an unprimeable number, because it can be changed into a prime (28641161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38177 + ... + 38919.

It is an arithmetic number, because the mean of its divisors is an integer number (2187360).

Almost surely, 2^28641164 is an apocalyptic number.

It is an amenable number.

28641164 is a deficient number, since it is larger than the sum of its proper divisors (23855476).

28641164 is a wasteful number, since it uses less digits than its factorization.

28641164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1187 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 28641164 is about 5351.7440148049. The cubic root of 28641164 is about 305.9592267715.

The spelling of 28641164 in words is "twenty-eight million, six hundred forty-one thousand, one hundred sixty-four".