9999804 has 24 divisors (see below), whose sum is σ = 23442048. Its totient is φ = 3317680.

The previous prime is 9999761. The next prime is 9999823. The reversal of 9999804 is 4089999.

9999804 = T₁₇₆ + T₁₇₇ + ... + T₄₀₂.

It is a happy number.

9999804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 889 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^9999804 is an apocalyptic number.

It is an amenable number.

9999804 is an abundant number, since it is smaller than the sum of its proper divisors (13442244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999804 is a wasteful number, since it uses less digits than its factorization.

9999804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3905 (or 3903 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 9999804 is about 3162.2466696955. The cubic root of 9999804 is about 215.4420614300.

The spelling of 9999804 in words is "nine million, nine hundred ninety-nine thousand, eight hundred four".