1990165744 has 40 divisors (see below), whose sum is σ = 4500569088. Its totient is φ = 834778560.

The previous prime is 1990165739. The next prime is 1990165747. The reversal of 1990165744 is 4475610991.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1990165694 and 1990165703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990165747) by changing a digit.

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, 183772 + ... + 194299.

Almost surely, 2^1990165744 is an apocalyptic number.

1990165744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1990165744 is an abundant number, since it is smaller than the sum of its proper divisors (2510403344).

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

1990165744 is a wasteful number, since it uses less digits than its factorization.

1990165744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378133 (or 378127 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1990165744 is about 44611.2737320960. The cubic root of 1990165744 is about 1257.8525915323.

The spelling of 1990165744 in words is "one billion, nine hundred ninety million, one hundred sixty-five thousand, seven hundred forty-four".