999879732 has 36 divisors (see below), whose sum is σ = 2540587140. Its totient is φ = 331564032.

The previous prime is 999879721. The next prime is 999879737. The reversal of 999879732 is 237978999.

It can be written as a sum of positive squares in 2 ways, for example, as 277022736 + 722856996 = 16644^2 + 26886^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×999879732³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999879732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999879737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65007 + ... + 78902.

It is an arithmetic number, because the mean of its divisors is an integer number (70571865).

Almost surely, 2^999879732 is an apocalyptic number.

It is an amenable number.

999879732 is an abundant number, since it is smaller than the sum of its proper divisors (1540707408).

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

999879732 is a wasteful number, since it uses less digits than its factorization.

999879732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144112 (or 144107 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The square root of 999879732 is about 31620.8749404567. The cubic root of 999879732 is about 999.9599090594.

The spelling of 999879732 in words is "nine hundred ninety-nine million, eight hundred seventy-nine thousand, seven hundred thirty-two".