9919804 has 12 divisors (see below), whose sum is σ = 17391024. Its totient is φ = 4950944.

The previous prime is 9919727. The next prime is 9919813. The reversal of 9919804 is 4089199.

It is a super-2 number, since 2×9919804² = 196805022796832, which contains 22 as substring.

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, 672 + ... + 4504.

It is an arithmetic number, because the mean of its divisors is an integer number (1449252).

Almost surely, 2^9919804 is an apocalyptic number.

It is an amenable number.

9919804 is a deficient number, since it is larger than the sum of its proper divisors (7471220).

9919804 is a wasteful number, since it uses less digits than its factorization.

9919804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 9919804 is about 3149.5720344199. The cubic root of 9919804 is about 214.8659990671.

The spelling of 9919804 in words is "nine million, nine hundred nineteen thousand, eight hundred four".