1889456444 has 48 divisors (see below), whose sum is σ = 3518592000. Its totient is φ = 885297600.

The previous prime is 1889456441. The next prime is 1889456497. The reversal of 1889456444 is 4446549881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889456441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4098374 + ... + 4098834.

It is an arithmetic number, because the mean of its divisors is an integer number (73304000).

Almost surely, 2^1889456444 is an apocalyptic number.

It is an amenable number.

1889456444 is a deficient number, since it is larger than the sum of its proper divisors (1629135556).

1889456444 is a wasteful number, since it uses less digits than its factorization.

1889456444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 952 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 53.

The square root of 1889456444 is about 43467.8783011087. The cubic root of 1889456444 is about 1236.2670521574.

The spelling of 1889456444 in words is "one billion, eight hundred eighty-nine million, four hundred fifty-six thousand, four hundred forty-four".