1990371760 has 40 divisors (see below), whose sum is σ = 4983587280. Its totient is φ = 734906112.

The previous prime is 1990371743. The next prime is 1990371767. The reversal of 1990371760 is 671730991.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1990371767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955870 + ... + 957949.

It is an arithmetic number, because the mean of its divisors is an integer number (124589682).

Almost surely, 2^1990371760 is an apocalyptic number.

1990371760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990371760 is an abundant number, since it is smaller than the sum of its proper divisors (2993215520).

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

1990371760 is a wasteful number, since it uses less digits than its factorization.

1990371760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913845 (or 1913839 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 1990371760 is about 44613.5826850971. The cubic root of 1990371760 is about 1257.8959930796.

The spelling of 1990371760 in words is "one billion, nine hundred ninety million, three hundred seventy-one thousand, seven hundred sixty".