85159890 has 32 divisors (see below), whose sum is σ = 227093760. Its totient is φ = 22709232.

The previous prime is 85159849. The next prime is 85159891. The reversal of 85159890 is 9895158.

85159890 is a `hidden beast` number, since 8 + 51 + 598 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (85159891) 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, 157434 + ... + 157973.

It is an arithmetic number, because the mean of its divisors is an integer number (7096680).

Almost surely, 2^85159890 is an apocalyptic number.

85159890 is an abundant number, since it is smaller than the sum of its proper divisors (141933870).

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

85159890 is a wasteful number, since it uses less digits than its factorization.

85159890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315423 (or 315417 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 85159890 is about 9228.2116360647. The cubic root of 85159890 is about 439.9584843750.

The spelling of 85159890 in words is "eighty-five million, one hundred fifty-nine thousand, eight hundred ninety".