999938412 has 96 divisors (see below), whose sum is σ = 2836512000. Its totient is φ = 302112000.

The previous prime is 999938399. The next prime is 999938461. The reversal of 999938412 is 214839999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475339 + ... + 477437.

It is an arithmetic number, because the mean of its divisors is an integer number (29547000).

Almost surely, 2^999938412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999938412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418256000).

999938412 is an abundant number, since it is smaller than the sum of its proper divisors (1836573588).

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

999938412 is a wasteful number, since it uses less digits than its factorization.

999938412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524 (or 2516 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 999938412 is about 31621.8027949072. The cubic root of 999938412 is about 999.9794702452.

The spelling of 999938412 in words is "nine hundred ninety-nine million, nine hundred thirty-eight thousand, four hundred twelve".