999968280 has 32 divisors (see below), whose sum is σ = 2999905200. Its totient is φ = 266658176.

The previous prime is 999968279. The next prime is 999968297. The reversal of 999968280 is 82869999.

999968280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×999968280² = 1999873122012316800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 4166415 + ... + 4166654.

Almost surely, 2^999968280 is an apocalyptic number.

It is an amenable number.

999968280 is an abundant number, since it is smaller than the sum of its proper divisors (1999936920).

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

999968280 is a wasteful number, since it uses less digits than its factorization.

999968280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333083 (or 8333079 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 60.

The square root of 999968280 is about 31622.2750604696. The cubic root of 999968280 is about 999.9894265549.

The spelling of 999968280 in words is "nine hundred ninety-nine million, nine hundred sixty-eight thousand, two hundred eighty".