9091890442 has 16 divisors (see below), whose sum is σ = 13918392000. Its totient is φ = 4452975520.

The previous prime is 9091890439. The next prime is 9091890481. The reversal of 9091890442 is 2440981909.

It is a junction number, because it is equal to n+sod(n) for n = 9091890392 and 9091890401.

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, 103942 + ... + 170257.

It is an arithmetic number, because the mean of its divisors is an integer number (869899500).

Almost surely, 2^9091890442 is an apocalyptic number.

9091890442 is a deficient number, since it is larger than the sum of its proper divisors (4826501558).

9091890442 is a wasteful number, since it uses less digits than its factorization.

9091890442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274541.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 9091890442 is about 95351.4050342207. The cubic root of 9091890442 is about 2087.1391182815.

The spelling of 9091890442 in words is "nine billion, ninety-one million, eight hundred ninety thousand, four hundred forty-two".