1940372209728 has 84 divisors (see below), whose sum is σ = 5562456215680. Its totient is φ = 646705886976.

The previous prime is 1940372209709. The next prime is 1940372209757. The reversal of 1940372209728 is 8279022730491.

It is a happy number.

1940372209728 is a `hidden beast` number, since 1 + 9 + 40 + 372 + 209 + 7 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4252101 + ... + 4686267.

Almost surely, 2^{1940372209728} is an apocalyptic number.

1940372209728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1940372209728 is an abundant number, since it is smaller than the sum of its proper divisors (3622084005952).

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

1940372209728 is a wasteful number, since it uses less digits than its factorization.

1940372209728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441944 (or 441931 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 1940372209728 in words is "one trillion, nine hundred forty billion, three hundred seventy-two million, two hundred nine thousand, seven hundred twenty-eight".