1439999964 has 48 divisors (see below), whose sum is σ = 4020516640. Its totient is φ = 443076480.

The previous prime is 1439999947. The next prime is 1440000043. The reversal of 1439999964 is 4699999341.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511417 + ... + 514224.

Almost surely, 2^1439999964 is an apocalyptic number.

It is an amenable number.

1439999964 is an abundant number, since it is smaller than the sum of its proper divisors (2580516676).

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

1439999964 is a wasteful number, since it uses less digits than its factorization.

1439999964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025667 (or 1025659 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 63.

The square root of 1439999964 is about 37947.3314476789. The cubic root of 1439999964 is about 1129.2432252469.

It can be divided in two parts, 143999996 and 4, that added together give a square (144000000 = 12000²).

The spelling of 1439999964 in words is "one billion, four hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred sixty-four".