9990428692 has 48 divisors (see below), whose sum is σ = 18885037248. Its totient is φ = 4607285760.

The previous prime is 9990428677. The next prime is 9990428753. The reversal of 9990428692 is 2968240999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891967 + ... + 903097.

It is an arithmetic number, because the mean of its divisors is an integer number (393438276).

Almost surely, 2^9990428692 is an apocalyptic number.

It is an amenable number.

9990428692 is a deficient number, since it is larger than the sum of its proper divisors (8894608556).

9990428692 is a wasteful number, since it uses less digits than its factorization.

9990428692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416 (or 11414 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The square root of 9990428692 is about 99952.1320032744. The cubic root of 9990428692 is about 2153.7471120184.

The spelling of 9990428692 in words is "nine billion, nine hundred ninety million, four hundred twenty-eight thousand, six hundred ninety-two".