9920404 has 24 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 4512480.

The previous prime is 9920399. The next prime is 9920411. The reversal of 9920404 is 4040299.

It is an Ulam number.

It is a congruent number.

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, 2349 + ... + 5035.

It is an arithmetic number, because the mean of its divisors is an integer number (790272).

Almost surely, 2^9920404 is an apocalyptic number.

It is an amenable number.

9920404 is a deficient number, since it is larger than the sum of its proper divisors (9046124).

9920404 is a wasteful number, since it uses less digits than its factorization.

9920404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 9920404 is about 3149.6672840159. The cubic root of 9920404 is about 214.8703310411.

It can be divided in two parts, 99 and 20404, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 9920404 in words is "nine million, nine hundred twenty thousand, four hundred four".