90195890 has 8 divisors (see below), whose sum is σ = 162352620. Its totient is φ = 36078352.

The previous prime is 90195883. The next prime is 90195901. The reversal of 90195890 is 9859109.

It can be written as a sum of positive squares in 2 ways, for example, as 90003169 + 192721 = 9487^2 + 439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4509785 + ... + 4509804.

Almost surely, 2^90195890 is an apocalyptic number.

90195890 is a deficient number, since it is larger than the sum of its proper divisors (72156730).

90195890 is a wasteful number, since it uses less digits than its factorization.

90195890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019596.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 90195890 is about 9497.1516782665. The cubic root of 90195890 is about 448.4653732629.

The spelling of 90195890 in words is "ninety million, one hundred ninety-five thousand, eight hundred ninety".