85617870 has 32 divisors (see below), whose sum is σ = 221290272. Its totient is φ = 21075072.

The previous prime is 85617863. The next prime is 85617871. The reversal of 85617870 is 7871658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85617871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109377 + ... + 110156.

It is an arithmetic number, because the mean of its divisors is an integer number (6915321).

Almost surely, 2^85617870 is an apocalyptic number.

85617870 is an abundant number, since it is smaller than the sum of its proper divisors (135672402).

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

85617870 is a wasteful number, since it uses less digits than its factorization.

85617870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219556.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 85617870 is about 9252.9924889195. The cubic root of 85617870 is about 440.7457566517.

The spelling of 85617870 in words is "eighty-five million, six hundred seventeen thousand, eight hundred seventy".