72857985 has 8 divisors (see below), whose sum is σ = 116572800. Its totient is φ = 38857584.

The previous prime is 72857969. The next prime is 72858047. The reversal of 72857985 is 58975827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72857985 - 2⁴ = 72857969 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 2428585 + ... + 2428614.

It is an arithmetic number, because the mean of its divisors is an integer number (14571600).

Almost surely, 2^72857985 is an apocalyptic number.

It is an amenable number.

72857985 is a deficient number, since it is larger than the sum of its proper divisors (43714815).

72857985 is a wasteful number, since it uses less digits than its factorization.

72857985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857207.

The product of its digits is 1411200, while the sum is 51.

The square root of 72857985 is about 8535.6889001416. The cubic root of 72857985 is about 417.6627259585.

The spelling of 72857985 in words is "seventy-two million, eight hundred fifty-seven thousand, nine hundred eighty-five".