1296915788 has 48 divisors (see below), whose sum is σ = 2751081984. Its totient is φ = 522236160.

The previous prime is 1296915773. The next prime is 1296915811. The reversal of 1296915788 is 8875196921.

It is a super-2 number, since 2×1296915788² = 3363981122327321888, which contains 22 as substring.

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, 326945 + ... + 330887.

It is an arithmetic number, because the mean of its divisors is an integer number (57314208).

Almost surely, 2^1296915788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296915788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375540992).

1296915788 is an abundant number, since it is smaller than the sum of its proper divisors (1454166196).

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

1296915788 is a wasteful number, since it uses less digits than its factorization.

1296915788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662 (or 4660 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 56.

The square root of 1296915788 is about 36012.7170316265. The cubic root of 1296915788 is about 1090.5291003632.

The spelling of 1296915788 in words is "one billion, two hundred ninety-six million, nine hundred fifteen thousand, seven hundred eighty-eight".