999988950 has 24 divisors (see below), whose sum is σ = 2479972968. Its totient is φ = 266663680.

The previous prime is 999988949. The next prime is 999988961. The reversal of 999988950 is 59889999.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333147 + ... + 3333446.

It is an arithmetic number, because the mean of its divisors is an integer number (103332207).

Almost surely, 2^999988950 is an apocalyptic number.

999988950 is an abundant number, since it is smaller than the sum of its proper divisors (1479984018).

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

999988950 is a wasteful number, since it uses less digits than its factorization.

999988950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666608 (or 6666603 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 66.

The square root of 999988950 is about 31622.6018853604. The cubic root of 999988950 is about 999.9963166531.

The spelling of 999988950 in words is "nine hundred ninety-nine million, nine hundred eighty-eight thousand, nine hundred fifty".