949999980 has 96 divisors (see below), whose sum is σ = 2759178240. Its totient is φ = 243936000.

The previous prime is 949999961. The next prime is 949999993. The reversal of 949999980 is 89999949.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1264605 + ... + 1265355.

It is an arithmetic number, because the mean of its divisors is an integer number (28741440).

Almost surely, 2^949999980 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 949999980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379589120).

949999980 is an abundant number, since it is smaller than the sum of its proper divisors (1809178260).

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

949999980 is a wasteful number, since it uses less digits than its factorization.

949999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 66.

The square root of 949999980 is about 30822.0696904020. The cubic root of 949999980 is about 983.0475655930.

The spelling of 949999980 in words is "nine hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred eighty".