28193164 has 12 divisors (see below), whose sum is σ = 49467600. Its totient is φ = 14059568.

The previous prime is 28193141. The next prime is 28193183. The reversal of 28193164 is 46139182.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7504 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (4122300).

Almost surely, 2^28193164 is an apocalyptic number.

It is an amenable number.

28193164 is a deficient number, since it is larger than the sum of its proper divisors (21274436).

28193164 is a wasteful number, since it uses less digits than its factorization.

28193164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18512 (or 18510 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 28193164 is about 5309.7235332925. The cubic root of 28193164 is about 304.3555828807.

The spelling of 28193164 in words is "twenty-eight million, one hundred ninety-three thousand, one hundred sixty-four".