999950890 has 16 divisors (see below), whose sum is σ = 1807844832. Its totient is φ = 398217424.

The previous prime is 999950881. The next prime is 999950891. The reversal of 999950890 is 98059999.

It is not an unprimeable number, because it can be changed into a prime (999950891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217984 + ... + 222523.

It is an arithmetic number, because the mean of its divisors is an integer number (112990302).

Almost surely, 2^999950890 is an apocalyptic number.

999950890 is a deficient number, since it is larger than the sum of its proper divisors (807893942).

999950890 is a wasteful number, since it uses less digits than its factorization.

999950890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440741.

The product of its (nonzero) digits is 2361960, while the sum is 58.

The square root of 999950890 is about 31622.0000948707. Note that the first 4 decimals coincide. The cubic root of 999950890 is about 999.9836297320.

The spelling of 999950890 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, eight hundred ninety".