1881944400 has 120 divisors (see below), whose sum is σ = 6889739584. Its totient is φ = 430156800.

The previous prime is 1881944369. The next prime is 1881944411. The reversal of 1881944400 is 44491881.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103621 + ... + 120420.

Almost surely, 2^1881944400 is an apocalyptic number.

1881944400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881944400 is an abundant number, since it is smaller than the sum of its proper divisors (5007795184).

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

1881944400 is a wasteful number, since it uses less digits than its factorization.

1881944400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224069 (or 224058 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1881944400 is about 43381.3831038154. The cubic root of 1881944400 is about 1234.6265049878.

The spelling of 1881944400 in words is "one billion, eight hundred eighty-one million, nine hundred forty-four thousand, four hundred".