999240804 has 36 divisors (see below), whose sum is σ = 2527381584. Its totient is φ = 332879472.

The previous prime is 999240721. The next prime is 999240859. The reversal of 999240804 is 408042999.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 999240804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59779 + ... + 74645.

It is an arithmetic number, because the mean of its divisors is an integer number (70205044).

Almost surely, 2^999240804 is an apocalyptic number.

It is an amenable number.

999240804 is an abundant number, since it is smaller than the sum of its proper divisors (1528140780).

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

999240804 is a wasteful number, since it uses less digits than its factorization.

999240804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16744 (or 16739 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 999240804 is about 31610.7703797298. The cubic root of 999240804 is about 999.7468705976.

The spelling of 999240804 in words is "nine hundred ninety-nine million, two hundred forty thousand, eight hundred four".