1439664446 has 16 divisors (see below), whose sum is σ = 2358246528. Its totient is φ = 653717400.

The previous prime is 1439664433. The next prime is 1439664449. The reversal of 1439664446 is 6444669341.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1439664446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439664449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11660 + ... + 54911.

It is an arithmetic number, because the mean of its divisors is an integer number (147390408).

Almost surely, 2^1439664446 is an apocalyptic number.

1439664446 is a deficient number, since it is larger than the sum of its proper divisors (918582082).

1439664446 is a wasteful number, since it uses less digits than its factorization.

1439664446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67567.

The product of its digits is 1492992, while the sum is 47.

The square root of 1439664446 is about 37942.9103522648. The cubic root of 1439664446 is about 1129.1555143978.

The spelling of 1439664446 in words is "one billion, four hundred thirty-nine million, six hundred sixty-four thousand, four hundred forty-six".