999238502812 has 72 divisors (see below), whose sum is σ = 2035947901680. Its totient is φ = 425458725120.

The previous prime is 999238502753. The next prime is 999238502827. The reversal of 999238502812 is 218205832999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1060258 + ... + 1767094.

It is an arithmetic number, because the mean of its divisors is an integer number (28277054190).

Almost surely, 2^999238502812 is an apocalyptic number.

It is an amenable number.

999238502812 is an abundant number, since it is smaller than the sum of its proper divisors (1036709398868).

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

999238502812 is a wasteful number, since it uses less digits than its factorization.

999238502812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706979 (or 706958 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 999238502812 in words is "nine hundred ninety-nine billion, two hundred thirty-eight million, five hundred two thousand, eight hundred twelve".