999952280 has 64 divisors (see below), whose sum is σ = 2323399680. Its totient is φ = 387072000.

The previous prime is 999952279. The next prime is 999952313. The reversal of 999952280 is 82259999.

It is a congruent number.

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, 205880 + ... + 210680.

It is an arithmetic number, because the mean of its divisors is an integer number (36303120).

Almost surely, 2^999952280 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 999952280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161699840).

999952280 is an abundant number, since it is smaller than the sum of its proper divisors (1323447400).

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

999952280 is a wasteful number, since it uses less digits than its factorization.

999952280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980 (or 4976 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 999952280 is about 31622.0220732324. The cubic root of 999952280 is about 999.9840930803.

The spelling of 999952280 in words is "nine hundred ninety-nine million, nine hundred fifty-two thousand, two hundred eighty".