85871590 has 32 divisors (see below), whose sum is σ = 187043904. Its totient is φ = 27709440.

The previous prime is 85871587. The next prime is 85871623. The reversal of 85871590 is 9517858.

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, 34891 + ... + 37270.

It is an arithmetic number, because the mean of its divisors is an integer number (5845122).

Almost surely, 2^85871590 is an apocalyptic number.

85871590 is an abundant number, since it is smaller than the sum of its proper divisors (101172314).

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

85871590 is a wasteful number, since it uses less digits than its factorization.

85871590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72192.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 85871590 is about 9266.6925059592. The cubic root of 85871590 is about 441.1806959665.

The spelling of 85871590 in words is "eighty-five million, eight hundred seventy-one thousand, five hundred ninety".