999729992 has 32 divisors (see below), whose sum is σ = 2041200000. Its totient is φ = 457224768.

The previous prime is 999729989. The next prime is 999730093. The reversal of 999729992 is 299927999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108992 + ... + 117807.

It is an arithmetic number, because the mean of its divisors is an integer number (63787500).

Almost surely, 2^999729992 is an apocalyptic number.

It is an amenable number.

999729992 is an abundant number, since it is smaller than the sum of its proper divisors (1041470008).

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

999729992 is a wasteful number, since it uses less digits than its factorization.

999729992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226853 (or 226849 counting only the distinct ones).

The product of its digits is 14880348, while the sum is 65.

The square root of 999729992 is about 31618.5071121329. The cubic root of 999729992 is about 999.9099892316.

The spelling of 999729992 in words is "nine hundred ninety-nine million, seven hundred twenty-nine thousand, nine hundred ninety-two".