1990966804 has 12 divisors (see below), whose sum is σ = 3486007924. Its totient is φ = 994964544.

The previous prime is 1990966787. The next prime is 1990966829. The reversal of 1990966804 is 4086690991.

It can be written as a sum of positive squares in 2 ways, for example, as 1664803204 + 326163600 = 40802^2 + 18060^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121017 + ... + 136480.

Almost surely, 2^1990966804 is an apocalyptic number.

It is an amenable number.

1990966804 is a deficient number, since it is larger than the sum of its proper divisors (1495041120).

1990966804 is a wasteful number, since it uses less digits than its factorization.

1990966804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259434 (or 259432 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1990966804 is about 44620.2510526330. The cubic root of 1990966804 is about 1258.0213346363.

The spelling of 1990966804 in words is "one billion, nine hundred ninety million, nine hundred sixty-six thousand, eight hundred four".