85978724 has 48 divisors (see below), whose sum is σ = 180633600. Its totient is φ = 35375616.

The previous prime is 85978723. The next prime is 85978729. The reversal of 85978724 is 42787958.

It is not an unprimeable number, because it can be changed into a prime (85978721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14237 + ... + 19355.

It is an arithmetic number, because the mean of its divisors is an integer number (3763200).

Almost surely, 2^85978724 is an apocalyptic number.

It is an amenable number.

85978724 is an abundant number, since it is smaller than the sum of its proper divisors (94654876).

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

85978724 is a wasteful number, since it uses less digits than its factorization.

85978724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172 (or 5170 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The square root of 85978724 is about 9272.4712994972. The cubic root of 85978724 is about 441.3640930988.

The spelling of 85978724 in words is "eighty-five million, nine hundred seventy-eight thousand, seven hundred twenty-four".