999261432 has 96 divisors (see below), whose sum is σ = 2922454080. Its totient is φ = 306627840.

The previous prime is 999261413. The next prime is 999261451. The reversal of 999261432 is 234162999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (999261413) and next prime (999261451).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 402178 + ... + 404654.

It is an arithmetic number, because the mean of its divisors is an integer number (30442230).

Almost surely, 2^999261432 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 999261432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461227040).

999261432 is an abundant number, since it is smaller than the sum of its proper divisors (1923192648).

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

999261432 is a wasteful number, since it uses less digits than its factorization.

999261432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933 (or 2926 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 999261432 is about 31611.0966592429. The cubic root of 999261432 is about 999.7537500326.

The spelling of 999261432 in words is "nine hundred ninety-nine million, two hundred sixty-one thousand, four hundred thirty-two".