999244990 has 8 divisors (see below), whose sum is σ = 1798641000. Its totient is φ = 399697992.

The previous prime is 999244969. The next prime is 999244991. The reversal of 999244990 is 99442999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999244991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49962240 + ... + 49962259.

It is an arithmetic number, because the mean of its divisors is an integer number (224830125).

Almost surely, 2^999244990 is an apocalyptic number.

999244990 is a deficient number, since it is larger than the sum of its proper divisors (799396010).

999244990 is a wasteful number, since it uses less digits than its factorization.

999244990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99924506.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The square root of 999244990 is about 31610.8365912704. The cubic root of 999244990 is about 999.7482666356.

The spelling of 999244990 in words is "nine hundred ninety-nine million, two hundred forty-four thousand, nine hundred ninety".