1990118922 has 32 divisors (see below), whose sum is σ = 4351644864. Its totient is φ = 601737600.

The previous prime is 1990118909. The next prime is 1990118951. The reversal of 1990118922 is 2298110991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2829 + ... + 63152.

It is an arithmetic number, because the mean of its divisors is an integer number (135988902).

Almost surely, 2^1990118922 is an apocalyptic number.

1990118922 is an abundant number, since it is smaller than the sum of its proper divisors (2361525942).

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

1990118922 is a wasteful number, since it uses less digits than its factorization.

1990118922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66454.

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 1990118922 is about 44610.7489513458. The cubic root of 1990118922 is about 1257.8427270882.

The spelling of 1990118922 in words is "one billion, nine hundred ninety million, one hundred eighteen thousand, nine hundred twenty-two".