85861588 has 6 divisors (see below), whose sum is σ = 150257786. Its totient is φ = 42930792.

The previous prime is 85861549. The next prime is 85861609. The reversal of 85861588 is 88516858.

It can be written as a sum of positive squares in only one way, i.e., 67043344 + 18818244 = 8188^2 + 4338^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10732695 + ... + 10732702.

Almost surely, 2^85861588 is an apocalyptic number.

It is an amenable number.

85861588 is a deficient number, since it is larger than the sum of its proper divisors (64396198).

85861588 is a wasteful number, since it uses less digits than its factorization.

85861588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21465401 (or 21465399 counting only the distinct ones).

The product of its digits is 614400, while the sum is 49.

The square root of 85861588 is about 9266.1528154893. The cubic root of 85861588 is about 441.1635662784.

The spelling of 85861588 in words is "eighty-five million, eight hundred sixty-one thousand, five hundred eighty-eight".