999941904 has 180 divisors, whose sum is σ = 3209851476. Its totient is φ = 289456128.

The previous prime is 999941881. The next prime is 999941927. The reversal of 999941904 is 409149999.

It is an interprime number because it is at equal distance from previous prime (999941881) and next prime (999941927).

It can be written as a sum of positive squares in 6 ways, for example, as 4665600 + 995276304 = 2160^2 + 31548^2 .

It is a super-2 number, since 2×999941904² = 1999767622750290432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 412504 + ... + 414920.

Almost surely, 2^999941904 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 999941904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604925738).

999941904 is an abundant number, since it is smaller than the sum of its proper divisors (2209909572).

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

999941904 is a wasteful number, since it uses less digits than its factorization.

999941904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 999941904 is about 31621.8580099272. The cubic root of 999941904 is about 999.9806342916.

The spelling of 999941904 in words is "nine hundred ninety-nine million, nine hundred forty-one thousand, nine hundred four".