85831278 has 24 divisors (see below), whose sum is σ = 185043768. Its totient is φ = 26384448.

The previous prime is 85831267. The next prime is 85831307. The reversal of 85831278 is 87213858.

It is a happy number.

It is a super-2 number, since 2×85831278² = 14734016566226568, 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 11 ways as a sum of consecutive naturals, for example, 81298 + ... + 82346.

It is an arithmetic number, because the mean of its divisors is an integer number (7710157).

Almost surely, 2^85831278 is an apocalyptic number.

85831278 is an abundant number, since it is smaller than the sum of its proper divisors (99212490).

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

85831278 is a wasteful number, since it uses less digits than its factorization.

85831278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 1067 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 85831278 is about 9264.5171487779. The cubic root of 85831278 is about 441.1116484505. Note that the first 3 decimals are identical.

The spelling of 85831278 in words is "eighty-five million, eight hundred thirty-one thousand, two hundred seventy-eight".