85161290 has 16 divisors (see below), whose sum is σ = 153653760. Its totient is φ = 33983760.

The previous prime is 85161283. The next prime is 85161311. The reversal of 85161290 is 9216158.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5570 + ... + 14189.

It is an arithmetic number, because the mean of its divisors is an integer number (9603360).

Almost surely, 2^85161290 is an apocalyptic number.

85161290 is a deficient number, since it is larger than the sum of its proper divisors (68492470).

85161290 is a wasteful number, since it uses less digits than its factorization.

85161290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20197.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 85161290 is about 9228.2874901035. The cubic root of 85161290 is about 439.9608952850.

The spelling of 85161290 in words is "eighty-five million, one hundred sixty-one thousand, two hundred ninety".