1881444446 has 16 divisors (see below), whose sum is σ = 3300342144. Its totient is φ = 787581144.

The previous prime is 1881444443. The next prime is 1881444457. The reversal of 1881444446 is 6444441881.

It is a junction number, because it is equal to n+sod(n) for n = 1881444397 and 1881444406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881444443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562060 + ... + 1563263.

It is an arithmetic number, because the mean of its divisors is an integer number (206271384).

Almost surely, 2^1881444446 is an apocalyptic number.

1881444446 is a deficient number, since it is larger than the sum of its proper divisors (1418897698).

1881444446 is a wasteful number, since it uses less digits than its factorization.

1881444446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125375.

The product of its digits is 393216, while the sum is 44.

The square root of 1881444446 is about 43375.6204105486. The cubic root of 1881444446 is about 1234.5171657449.

The spelling of 1881444446 in words is "one billion, eight hundred eighty-one million, four hundred forty-four thousand, four hundred forty-six".