1881474444 has 72 divisors (see below), whose sum is σ = 4939963392. Its totient is φ = 603145440.

The previous prime is 1881474433. The next prime is 1881474509. The reversal of 1881474444 is 4444741881.

It is a self number, because there is not a number n which added to its sum of digits gives 1881474444.

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, 176737 + ... + 187079.

Almost surely, 2^1881474444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881474444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469981696).

1881474444 is an abundant number, since it is smaller than the sum of its proper divisors (3058488948).

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

1881474444 is a wasteful number, since it uses less digits than its factorization.

1881474444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547 (or 10542 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The square root of 1881474444 is about 43375.9662024951. The cubic root of 1881474444 is about 1234.5237268119.

The spelling of 1881474444 in words is "one billion, eight hundred eighty-one million, four hundred seventy-four thousand, four hundred forty-four".