90990692 has 24 divisors (see below), whose sum is σ = 172002936. Its totient is φ = 41868288.

The previous prime is 90990671. The next prime is 90990701. The reversal of 90990692 is 29609909.

It can be written as a sum of positive squares in 4 ways, for example, as 10278436 + 80712256 = 3206^2 + 8984^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 15878 + ... + 20834.

It is an arithmetic number, because the mean of its divisors is an integer number (7166789).

Almost surely, 2^90990692 is an apocalyptic number.

It is an amenable number.

90990692 is a deficient number, since it is larger than the sum of its proper divisors (81012244).

90990692 is a wasteful number, since it uses less digits than its factorization.

90990692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327 (or 5325 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 90990692 is about 9538.9041299302. The cubic root of 90990692 is about 449.7788081662.

The spelling of 90990692 in words is "ninety million, nine hundred ninety thousand, six hundred ninety-two".