1239681296 has 80 divisors (see below), whose sum is σ = 2912194560. Its totient is φ = 499374720.

The previous prime is 1239681257. The next prime is 1239681329. The reversal of 1239681296 is 6921869321.

It is a self number, because there is not a number n which added to its sum of digits gives 1239681296.

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, 276545 + ... + 280991.

It is an arithmetic number, because the mean of its divisors is an integer number (36402432).

Almost surely, 2^1239681296 is an apocalyptic number.

1239681296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239681296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456097280).

1239681296 is an abundant number, since it is smaller than the sum of its proper divisors (1672513264).

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

1239681296 is a wasteful number, since it uses less digits than its factorization.

1239681296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612 (or 4606 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 1239681296 is about 35209.1081397981. The cubic root of 1239681296 is about 1074.2450212954.

The spelling of 1239681296 in words is "one billion, two hundred thirty-nine million, six hundred eighty-one thousand, two hundred ninety-six".