85991310 has 48 divisors (see below), whose sum is σ = 224256240. Its totient is φ = 22861440.

The previous prime is 85991291. The next prime is 85991363. The reversal of 85991310 is 1319958.

It is a happy number.

It is a super-2 number, since 2×85991310² = 14789010791032200, 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 23 ways as a sum of consecutive naturals, for example, 32850 + ... + 35370.

It is an arithmetic number, because the mean of its divisors is an integer number (4672005).

Almost surely, 2^85991310 is an apocalyptic number.

85991310 is an abundant number, since it is smaller than the sum of its proper divisors (138264930).

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

85991310 is a wasteful number, since it uses less digits than its factorization.

85991310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913 (or 2910 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 85991310 is about 9273.1499502596. The cubic root of 85991310 is about 441.3856284166.

The spelling of 85991310 in words is "eighty-five million, nine hundred ninety-one thousand, three hundred ten".