1489905664 has 96 divisors (see below), whose sum is σ = 3244419360. Its totient is φ = 679919616.

The previous prime is 1489905643. The next prime is 1489905671. The reversal of 1489905664 is 4665099841.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2848507 + ... + 2849029.

It is an arithmetic number, because the mean of its divisors is an integer number (33796035).

Almost surely, 2^1489905664 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 1489905664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622209680).

1489905664 is an abundant number, since it is smaller than the sum of its proper divisors (1754513696).

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

1489905664 is a wasteful number, since it uses less digits than its factorization.

1489905664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 1489905664 is about 38599.2961593861. The cubic root of 1489905664 is about 1142.1406541454.

The spelling of 1489905664 in words is "one billion, four hundred eighty-nine million, nine hundred five thousand, six hundred sixty-four".