85122990 has 24 divisors (see below), whose sum is σ = 221320008. Its totient is φ = 22699440.

The previous prime is 85122971. The next prime is 85122991. The reversal of 85122990 is 9922158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85122991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472816 + ... + 472995.

It is an arithmetic number, because the mean of its divisors is an integer number (9221667).

Almost surely, 2^85122990 is an apocalyptic number.

85122990 is an abundant number, since it is smaller than the sum of its proper divisors (136197018).

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

85122990 is a wasteful number, since it uses less digits than its factorization.

85122990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945824 (or 945821 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 85122990 is about 9226.2121154892. The cubic root of 85122990 is about 439.8949301460.

The spelling of 85122990 in words is "eighty-five million, one hundred twenty-two thousand, nine hundred ninety".