90192890 has 16 divisors (see below), whose sum is σ = 169406208. Its totient is φ = 34508496.

The previous prime is 90192841. The next prime is 90192917. The reversal of 90192890 is 9829109.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195842 + ... + 196301.

It is an arithmetic number, because the mean of its divisors is an integer number (10587888).

Almost surely, 2^90192890 is an apocalyptic number.

90192890 is a deficient number, since it is larger than the sum of its proper divisors (79213318).

90192890 is a wasteful number, since it uses less digits than its factorization.

90192890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392173.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 90192890 is about 9496.9937348616. The cubic root of 90192890 is about 448.4604010813.

The spelling of 90192890 in words is "ninety million, one hundred ninety-two thousand, eight hundred ninety".