85138772 has 24 divisors (see below), whose sum is σ = 161898240. Its totient is φ = 39026880.

The previous prime is 85138759. The next prime is 85138799. The reversal of 85138772 is 27783158.

It is a super-2 number, since 2×85138772² = 14497220995335968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15713 + ... + 20424.

It is an arithmetic number, because the mean of its divisors is an integer number (6745760).

Almost surely, 2^85138772 is an apocalyptic number.

It is an amenable number.

85138772 is a deficient number, since it is larger than the sum of its proper divisors (76759468).

85138772 is a wasteful number, since it uses less digits than its factorization.

85138772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36191 (or 36189 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 85138772 is about 9227.0673564248. The cubic root of 85138772 is about 439.9221143132.

The spelling of 85138772 in words is "eighty-five million, one hundred thirty-eight thousand, seven hundred seventy-two".