90197804 has 12 divisors (see below), whose sum is σ = 158008200. Its totient is φ = 45052608.

The previous prime is 90197803. The next prime is 90197839. The reversal of 90197804 is 40879109.

It is not an unprimeable number, because it can be changed into a prime (90197803) 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, 6989 + ... + 15140.

It is an arithmetic number, because the mean of its divisors is an integer number (13167350).

Almost surely, 2^90197804 is an apocalyptic number.

It is an amenable number.

90197804 is a deficient number, since it is larger than the sum of its proper divisors (67810396).

90197804 is a wasteful number, since it uses less digits than its factorization.

90197804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23152 (or 23150 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 90197804 is about 9497.2524447863. The cubic root of 90197804 is about 448.4685454572.

The spelling of 90197804 in words is "ninety million, one hundred ninety-seven thousand, eight hundred four".