28938160 has 20 divisors (see below), whose sum is σ = 67281408. Its totient is φ = 11575232.

The previous prime is 28938157. The next prime is 28938167. The reversal of 28938160 is 6183982.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (28938167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180784 + ... + 180943.

Almost surely, 2^28938160 is an apocalyptic number.

28938160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28938160 is an abundant number, since it is smaller than the sum of its proper divisors (38343248).

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

28938160 is a wasteful number, since it uses less digits than its factorization.

28938160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361740 (or 361734 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28938160 is about 5379.4200430901. The cubic root of 28938160 is about 307.0131454652.

The spelling of 28938160 in words is "twenty-eight million, nine hundred thirty-eight thousand, one hundred sixty".