999986280 has 64 divisors (see below), whose sum is σ = 3050827200. Its totient is φ = 262141440.

The previous prime is 999986279. The next prime is 999986297. The reversal of 999986280 is 82689999.

999986280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63541 + ... + 77700.

It is an arithmetic number, because the mean of its divisors is an integer number (47669175).

Almost surely, 2^999986280 is an apocalyptic number.

It is an amenable number.

999986280 is an abundant number, since it is smaller than the sum of its proper divisors (2050840920).

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

999986280 is a wasteful number, since it uses less digits than its factorization.

999986280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141314 (or 141310 counting only the distinct ones).

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

The square root of 999986280 is about 31622.5596686922. The cubic root of 999986280 is about 999.9954266458.

The spelling of 999986280 in words is "nine hundred ninety-nine million, nine hundred eighty-six thousand, two hundred eighty".