1297955688 has 128 divisors (see below), whose sum is σ = 3497472000. Its totient is φ = 400409856.

The previous prime is 1297955677. The next prime is 1297955699. The reversal of 1297955688 is 8865597921.

It is an interprime number because it is at equal distance from previous prime (1297955677) and next prime (1297955699).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3536481 + ... + 3536847.

It is an arithmetic number, because the mean of its divisors is an integer number (27324000).

Almost surely, 2^1297955688 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 1297955688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748736000).

1297955688 is an abundant number, since it is smaller than the sum of its proper divisors (2199516312).

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

1297955688 is a wasteful number, since it uses less digits than its factorization.

1297955688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 587 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 60.

The square root of 1297955688 is about 36027.1520939416. The cubic root of 1297955688 is about 1090.8204937998.

The spelling of 1297955688 in words is "one billion, two hundred ninety-seven million, nine hundred fifty-five thousand, six hundred eighty-eight".