1889286444 has 120 divisors (see below), whose sum is σ = 5139243648. Its totient is φ = 604558080.

The previous prime is 1889286433. The next prime is 1889286473. The reversal of 1889286444 is 4446829881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1375342 + ... + 1376714.

Almost surely, 2^1889286444 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 1889286444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569621824).

1889286444 is an abundant number, since it is smaller than the sum of its proper divisors (3249957204).

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

1889286444 is a wasteful number, since it uses less digits than its factorization.

1889286444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1546 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 54.

The square root of 1889286444 is about 43465.9227901583. The cubic root of 1889286444 is about 1236.2299741743.

The spelling of 1889286444 in words is "one billion, eight hundred eighty-nine million, two hundred eighty-six thousand, four hundred forty-four".