9920408 has 16 divisors (see below), whose sum is σ = 18856680. Its totient is φ = 4891968.

The previous prime is 9920399. The next prime is 9920411. The reversal of 9920408 is 8040299.

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, 7910 + ... + 9077.

Almost surely, 2^9920408 is an apocalyptic number.

It is an amenable number.

9920408 is a deficient number, since it is larger than the sum of its proper divisors (8936272).

9920408 is a wasteful number, since it uses less digits than its factorization.

9920408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17066 (or 17062 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 9920408 is about 3149.6679190035. The cubic root of 9920408 is about 214.8703599203.

The spelling of 9920408 in words is "nine million, nine hundred twenty thousand, four hundred eight".