85980290 has 64 divisors (see below), whose sum is σ = 174493440. Its totient is φ = 30240000.

The previous prime is 85980289. The next prime is 85980299. The reversal of 85980290 is 9208958.

It is a happy number.

It is a super-2 number, since 2×85980290² = 14785220536968200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85980299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 788756 + ... + 788864.

It is an arithmetic number, because the mean of its divisors is an integer number (2726460).

Almost surely, 2^85980290 is an apocalyptic number.

85980290 is an abundant number, since it is smaller than the sum of its proper divisors (88513150).

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

85980290 is a wasteful number, since it uses less digits than its factorization.

85980290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 85980290 is about 9272.5557426203. Note that the first 3 decimals coincide. The cubic root of 85980290 is about 441.3667727229.

The spelling of 85980290 in words is "eighty-five million, nine hundred eighty thousand, two hundred ninety".