999959824 has 40 divisors (see below), whose sum is σ = 2017292760. Its totient is φ = 479769600.

The previous prime is 999959803. The next prime is 999959867. The reversal of 999959824 is 428959999.

It can be written as a sum of positive squares in 4 ways, for example, as 28515600 + 971444224 = 5340^2 + 31168^2 .

It is a super-2 number, since 2×999959824² = 1999839299228221952, which contains 22 as substring.

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, 27522 + ... + 52510.

It is an arithmetic number, because the mean of its divisors is an integer number (50432319).

Almost surely, 2^999959824 is an apocalyptic number.

It is an amenable number.

999959824 is an abundant number, since it is smaller than the sum of its proper divisors (1017332936).

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

999959824 is a wasteful number, since it uses less digits than its factorization.

999959824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25099 (or 25093 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 64.

The square root of 999959824 is about 31622.1413569670. The cubic root of 999959824 is about 999.9866078207.

The spelling of 999959824 in words is "nine hundred ninety-nine million, nine hundred fifty-nine thousand, eight hundred twenty-four".