1990716886 has 16 divisors (see below), whose sum is σ = 3033689760. Its totient is φ = 979538560.

The previous prime is 1990716869. The next prime is 1990716901. The reversal of 1990716886 is 6886170991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66510 + ... + 91678.

It is an arithmetic number, because the mean of its divisors is an integer number (189605610).

Almost surely, 2^1990716886 is an apocalyptic number.

1990716886 is a deficient number, since it is larger than the sum of its proper divisors (1042972874).

1990716886 is a wasteful number, since it uses less digits than its factorization.

1990716886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25799.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 1990716886 is about 44617.4504650367. The cubic root of 1990716886 is about 1257.9686943259.

The spelling of 1990716886 in words is "one billion, nine hundred ninety million, seven hundred sixteen thousand, eight hundred eighty-six".