1239999996 has 12 divisors (see below), whose sum is σ = 2893333352. Its totient is φ = 413333328.

The previous prime is 1239999979. The next prime is 1240000033. The reversal of 1239999996 is 6999999321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51666655 + ... + 51666678.

Almost surely, 2^1239999996 is an apocalyptic number.

It is an amenable number.

1239999996 is an abundant number, since it is smaller than the sum of its proper divisors (1653333356).

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

1239999996 is a wasteful number, since it uses less digits than its factorization.

1239999996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103333340 (or 103333338 counting only the distinct ones).

The product of its digits is 19131876, while the sum is 66.

The square root of 1239999996 is about 35213.6336665218. The cubic root of 1239999996 is about 1074.3370698338.

The spelling of 1239999996 in words is "one billion, two hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-six".