9990426746 has 16 divisors (see below), whose sum is σ = 16318303200. Its totient is φ = 4569123888.

The previous prime is 9990426731. The next prime is 9990426781. The reversal of 9990426746 is 6476240999.

9990426746 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9990426691 and 9990426700.

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, 4531760 + ... + 4533963.

It is an arithmetic number, because the mean of its divisors is an integer number (1019893950).

Almost surely, 2^9990426746 is an apocalyptic number.

9990426746 is a deficient number, since it is larger than the sum of its proper divisors (6327876454).

9990426746 is a wasteful number, since it uses less digits than its factorization.

9990426746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9065773.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The square root of 9990426746 is about 99952.1222686142. The cubic root of 9990426746 is about 2153.7469721781.

The spelling of 9990426746 in words is "nine billion, nine hundred ninety million, four hundred twenty-six thousand, seven hundred forty-six".