90195804 has 36 divisors (see below), whose sum is σ = 230564880. Its totient is φ = 29726400.

The previous prime is 90195797. The next prime is 90195817. The reversal of 90195804 is 40859109.

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 10872 + ... + 17279.

It is an arithmetic number, because the mean of its divisors is an integer number (6404580).

Almost surely, 2^90195804 is an apocalyptic number.

It is an amenable number.

90195804 is an abundant number, since it is smaller than the sum of its proper divisors (140369076).

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

90195804 is a wasteful number, since it uses less digits than its factorization.

90195804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28250 (or 28245 counting only the distinct ones).

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

The square root of 90195804 is about 9497.1471505921. The cubic root of 90195804 is about 448.4652307286.

The spelling of 90195804 in words is "ninety million, one hundred ninety-five thousand, eight hundred four".