9990804 has 48 divisors (see below), whose sum is σ = 24385536.
Its totient is φ = 3180000.
The previous prime is 9990803. The next prime is 9990811. The reversal of 9990804 is 4080999.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9990803) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39679 + ... + 39929.
It is an arithmetic number, because the mean of its divisors is an integer number (508032).
Almost surely, 29990804 is an apocalyptic number.
It is an amenable number.
9990804 is an abundant number, since it is smaller than the sum of its proper divisors (14394732).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9990804 is a wasteful number, since it uses less digits than its factorization.
9990804 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 396 (or 394 counting only the distinct ones).
The product of its (nonzero) digits is 23328, while the sum is 39.
The square root of 9990804 is about 3160.8233104683.
The cubic root of 9990804 is about 215.3774081445.
The spelling of 9990804 in words is "nine million, nine hundred ninety thousand, eight hundred four".