1881903940 has 48 divisors (see below), whose sum is σ = 4546531584. Its totient is φ = 640944000.

The previous prime is 1881903937. The next prime is 1881903941. The reversal of 1881903940 is 493091881.

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

It is not an unprimeable number, because it can be changed into a prime (1881903941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23371 + ... + 65650.

It is an arithmetic number, because the mean of its divisors is an integer number (94719408).

Almost surely, 2^1881903940 is an apocalyptic number.

1881903940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881903940 is an abundant number, since it is smaller than the sum of its proper divisors (2664627644).

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

1881903940 is a wasteful number, since it uses less digits than its factorization.

1881903940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89188 (or 89186 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1881903940 is about 43380.9167722398. The cubic root of 1881903940 is about 1234.6176571624.

The spelling of 1881903940 in words is "one billion, eight hundred eighty-one million, nine hundred three thousand, nine hundred forty".