1044489816 has 72 divisors (see below), whose sum is σ = 2937605580. Its totient is φ = 347688288.

The previous prime is 1044489799. The next prime is 1044489821. The reversal of 1044489816 is 6189844401.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1044489816 is a `hidden beast` number, since 104 + 448 + 98 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1424586 + ... + 1425318.

Almost surely, 2^1044489816 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 1044489816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468802790).

1044489816 is an abundant number, since it is smaller than the sum of its proper divisors (1893115764).

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

1044489816 is an frugal number, since it uses more digits than its factorization.

1044489816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 738 counting only the distinct ones).

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

The square root of 1044489816 is about 32318.5676662813. The cubic root of 1044489816 is about 1014.6152912857.

Multiplying 1044489816 by its product of nonzero digits (221184), we get a square (231024435462144 = 15199488²).

The spelling of 1044489816 in words is "one billion, forty-four million, four hundred eighty-nine thousand, eight hundred sixteen".