72857160 has 48 divisors (see below), whose sum is σ = 236786940. Its totient is φ = 19428480.

The previous prime is 72857131. The next prime is 72857171. The reversal of 72857160 is 6175827.

72857160 is a `hidden beast` number, since 7 + 28 + 571 + 60 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70660836 + 2196324 = 8406^2 + 1482^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 100831 + ... + 101550.

Almost surely, 2^72857160 is an apocalyptic number.

It is an amenable number.

72857160 is an abundant number, since it is smaller than the sum of its proper divisors (163929780).

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

72857160 is a wasteful number, since it uses less digits than its factorization.

72857160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202398 (or 202391 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 72857160 is about 8535.6405735012. The cubic root of 72857160 is about 417.6611494987.

The spelling of 72857160 in words is "seventy-two million, eight hundred fifty-seven thousand, one hundred sixty".