1881944064 has 832 divisors, whose sum is σ = 7926266880. Its totient is φ = 424673280.

The previous prime is 1881944033. The next prime is 1881944101. The reversal of 1881944064 is 4604491881.

It is a tau number, because it is divible by the number of its divisors (832).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 110702584 + ... + 110702600.

Almost surely, 2^1881944064 is an apocalyptic number.

1881944064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881944064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3963133440).

1881944064 is an abundant number, since it is smaller than the sum of its proper divisors (6044322816).

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

1881944064 is a wasteful number, since it uses less digits than its factorization.

1881944064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1881944064 is about 43381.3792311863. The cubic root of 1881944064 is about 1234.6264315116.

The spelling of 1881944064 in words is "one billion, eight hundred eighty-one million, nine hundred forty-four thousand, sixty-four".