85890920 has 16 divisors (see below), whose sum is σ = 193254660. Its totient is φ = 34356352.

The previous prime is 85890913. The next prime is 85890923. The reversal of 85890920 is 2909858.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 85784644 + 106276 = 9262^2 + 326^2 .

It is not an unprimeable number, because it can be changed into a prime (85890923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073597 + ... + 1073676.

Almost surely, 2^85890920 is an apocalyptic number.

It is an amenable number.

85890920 is an abundant number, since it is smaller than the sum of its proper divisors (107363740).

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

85890920 is a wasteful number, since it uses less digits than its factorization.

85890920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147284 (or 2147280 counting only the distinct ones).

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

The square root of 85890920 is about 9267.7354299743. The cubic root of 85890920 is about 441.2137972636.

The spelling of 85890920 in words is "eighty-five million, eight hundred ninety thousand, nine hundred twenty".