90800856 has 48 divisors (see below), whose sum is σ = 254404800. Its totient is φ = 29222592.

The previous prime is 90800813. The next prime is 90800861. The reversal of 90800856 is 65800809.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 90800856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19656 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (5300100).

Almost surely, 2^90800856 is an apocalyptic number.

It is an amenable number.

90800856 is an abundant number, since it is smaller than the sum of its proper divisors (163603944).

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

90800856 is a wasteful number, since it uses less digits than its factorization.

90800856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43528 (or 43521 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 90800856 is about 9528.9483155278. The cubic root of 90800856 is about 449.4657957156.

The spelling of 90800856 in words is "ninety million, eight hundred thousand, eight hundred fifty-six".