28931160 has 32 divisors (see below), whose sum is σ = 86793840. Its totient is φ = 7714944.

The previous prime is 28931099. The next prime is 28931191. The reversal of 28931160 is 6113982.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 120427 + ... + 120666.

Almost surely, 2^28931160 is an apocalyptic number.

28931160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28931160 is an abundant number, since it is smaller than the sum of its proper divisors (57862680).

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

28931160 is a wasteful number, since it uses less digits than its factorization.

28931160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241107 (or 241103 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 28931160 is about 5378.7693759818. The cubic root of 28931160 is about 306.9883884739.

The spelling of 28931160 in words is "twenty-eight million, nine hundred thirty-one thousand, one hundred sixty".