85811290 has 16 divisors (see below), whose sum is σ = 159787080. Its totient is φ = 33140800.

The previous prime is 85811279. The next prime is 85811303. The reversal of 85811290 is 9211858.

It can be written as a sum of positive squares in 4 ways, for example, as 40208281 + 45603009 = 6341^2 + 6753^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147661 + ... + 148240.

Almost surely, 2^85811290 is an apocalyptic number.

85811290 is a deficient number, since it is larger than the sum of its proper divisors (73975790).

85811290 is a wasteful number, since it uses less digits than its factorization.

85811290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295937.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 85811290 is about 9263.4383465320. The cubic root of 85811290 is about 441.0774044300.

The spelling of 85811290 in words is "eighty-five million, eight hundred eleven thousand, two hundred ninety".