1990717736 has 32 divisors (see below), whose sum is σ = 4346317440. Its totient is φ = 837066048.

The previous prime is 1990717727. The next prime is 1990717753. The reversal of 1990717736 is 6377170991.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 332396 + ... + 338331.

It is an arithmetic number, because the mean of its divisors is an integer number (135822420).

Almost surely, 2^1990717736 is an apocalyptic number.

It is an amenable number.

1990717736 is an abundant number, since it is smaller than the sum of its proper divisors (2355599704).

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

1990717736 is a wasteful number, since it uses less digits than its factorization.

1990717736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670793 (or 670789 counting only the distinct ones).

The product of its (nonzero) digits is 500094, while the sum is 50.

The square root of 1990717736 is about 44617.4599904567. The cubic root of 1990717736 is about 1257.9688733691.

The spelling of 1990717736 in words is "one billion, nine hundred ninety million, seven hundred seventeen thousand, seven hundred thirty-six".