28857160 has 32 divisors (see below), whose sum is σ = 68749560. Its totient is φ = 10863616.

The previous prime is 28857139. The next prime is 28857193. The reversal of 28857160 is 6175882.

It can be written as a sum of positive squares in 4 ways, for example, as 28708164 + 148996 = 5358^2 + 386^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20539 + ... + 21898.

Almost surely, 2^28857160 is an apocalyptic number.

28857160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28857160 is an abundant number, since it is smaller than the sum of its proper divisors (39892400).

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

28857160 is a wasteful number, since it uses less digits than its factorization.

28857160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42465 (or 42461 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28857160 is about 5371.8860747413. The cubic root of 28857160 is about 306.7264271270.

The spelling of 28857160 in words is "twenty-eight million, eight hundred fifty-seven thousand, one hundred sixty".