1489645668 has 72 divisors (see below), whose sum is σ = 4182796800. Its totient is φ = 410932032.

The previous prime is 1489645649. The next prime is 1489645679. The reversal of 1489645668 is 8665469841.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26628 + ... + 60731.

It is an arithmetic number, because the mean of its divisors is an integer number (58094400).

Almost surely, 2^1489645668 is an apocalyptic number.

It is an amenable number.

1489645668 is an abundant number, since it is smaller than the sum of its proper divisors (2693151132).

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

1489645668 is a wasteful number, since it uses less digits than its factorization.

1489645668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87409 (or 87400 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The square root of 1489645668 is about 38595.9281272002. The cubic root of 1489645668 is about 1142.0742138592.

The spelling of 1489645668 in words is "one billion, four hundred eighty-nine million, six hundred forty-five thousand, six hundred sixty-eight".