85686590 has 32 divisors (see below), whose sum is σ = 174065760. Its totient is φ = 30083200.

The previous prime is 85686589. The next prime is 85686617. The reversal of 85686590 is 9568658.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10241 + ... + 16620.

It is an arithmetic number, because the mean of its divisors is an integer number (5439555).

Almost surely, 2^85686590 is an apocalyptic number.

85686590 is an abundant number, since it is smaller than the sum of its proper divisors (88379170).

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

85686590 is a wasteful number, since it uses less digits than its factorization.

85686590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26908.

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 85686590 is about 9256.7051373585. The cubic root of 85686590 is about 440.8636446136.

The spelling of 85686590 in words is "eighty-five million, six hundred eighty-six thousand, five hundred ninety".