28731160 has 32 divisors (see below), whose sum is σ = 66225600. Its totient is φ = 11211520.

The previous prime is 28731137. The next prime is 28731179. The reversal of 28731160 is 6113782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7120 + ... + 10399.

It is an arithmetic number, because the mean of its divisors is an integer number (2069550).

Almost surely, 2^28731160 is an apocalyptic number.

28731160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28731160 is an abundant number, since it is smaller than the sum of its proper divisors (37494440).

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

28731160 is a wasteful number, since it uses less digits than its factorization.

28731160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17571 (or 17567 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 28731160 is about 5360.1455204127. The cubic root of 28731160 is about 306.2793524553.

The spelling of 28731160 in words is "twenty-eight million, seven hundred thirty-one thousand, one hundred sixty".