999749960 has 64 divisors (see below), whose sum is σ = 2457449280. Its totient is φ = 363024640.

The previous prime is 999749939. The next prime is 999749983. The reversal of 999749960 is 69947999.

It is a junction number, because it is equal to n+sod(n) for n = 999749893 and 999749902.

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 15 ways as a sum of consecutive naturals, for example, 444599 + ... + 446841.

It is an arithmetic number, because the mean of its divisors is an integer number (38397645).

Almost surely, 2^999749960 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 999749960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228724640).

999749960 is an abundant number, since it is smaller than the sum of its proper divisors (1457699320).

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

999749960 is a wasteful number, since it uses less digits than its factorization.

999749960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278 (or 3274 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 62.

The square root of 999749960 is about 31618.8228749901. The cubic root of 999749960 is about 999.9166463857.

The spelling of 999749960 in words is "nine hundred ninety-nine million, seven hundred forty-nine thousand, nine hundred sixty".