999990624 has 48 divisors (see below), whose sum is σ = 2626948800. Its totient is φ = 333079680.

The previous prime is 999990599. The next prime is 999990631. The reversal of 999990624 is 426099999.

999990624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 160039 + ... + 166169.

It is an arithmetic number, because the mean of its divisors is an integer number (54728100).

Almost surely, 2^999990624 is an apocalyptic number.

It is an amenable number.

999990624 is an abundant number, since it is smaller than the sum of its proper divisors (1626958176).

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

999990624 is a wasteful number, since it uses less digits than its factorization.

999990624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7843 (or 7835 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 57.

The square root of 999990624 is about 31622.6283537596. The cubic root of 999990624 is about 999.9968746569.

The spelling of 999990624 in words is "nine hundred ninety-nine million, nine hundred ninety thousand, six hundred twenty-four".