1940319840 has 48 divisors (see below), whose sum is σ = 6112009008. Its totient is φ = 517418496.

The previous prime is 1940319833. The next prime is 1940319841. The reversal of 1940319840 is 489130491.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940319841) 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, 2020687 + ... + 2021646.

It is an arithmetic number, because the mean of its divisors is an integer number (127333521).

Almost surely, 2^1940319840 is an apocalyptic number.

1940319840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1940319840 is an abundant number, since it is smaller than the sum of its proper divisors (4171689168).

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

1940319840 is a wasteful number, since it uses less digits than its factorization.

1940319840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042351 (or 4042343 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1940319840 is about 44049.0617380212. The cubic root of 1940319840 is about 1247.2622406500.

The spelling of 1940319840 in words is "one billion, nine hundred forty million, three hundred nineteen thousand, eight hundred forty".