85789431 has 72 divisors (see below), whose sum is σ = 159038880. Its totient is φ = 43390080.

The previous prime is 85789399. The next prime is 85789439. The reversal of 85789431 is 13498758.

It is not a de Polignac number, because 85789431 - 2⁵ = 85789399 is a prime.

It is a super-2 number, since 2×85789431² = 14719652942607522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85789439) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 787005 + ... + 787113.

Almost surely, 2^85789431 is an apocalyptic number.

85789431 is a deficient number, since it is larger than the sum of its proper divisors (73249449).

85789431 is a wasteful number, since it uses less digits than its factorization.

85789431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 163 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 85789431 is about 9262.2584179022. The cubic root of 85789431 is about 441.0399488700.

The spelling of 85789431 in words is "eighty-five million, seven hundred eighty-nine thousand, four hundred thirty-one".