9990424 has 16 divisors (see below), whose sum is σ = 19834200. Its totient is φ = 4701312.

The previous prime is 9990403. The next prime is 9990457. The reversal of 9990424 is 4240999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36594 + ... + 36865.

Almost surely, 2^9990424 is an apocalyptic number.

It is an amenable number.

9990424 is a deficient number, since it is larger than the sum of its proper divisors (9843776).

9990424 is a wasteful number, since it uses less digits than its factorization.

9990424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73482 (or 73478 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 9990424 is about 3160.7631989758. The cubic root of 9990424 is about 215.3746774850.

The spelling of 9990424 in words is "nine million, nine hundred ninety thousand, four hundred twenty-four".