1312697232 has 640 divisors, whose sum is σ = 5180620800. Its totient is φ = 307929600.

The previous prime is 1312697231. The next prime is 1312697233. The reversal of 1312697232 is 2327962131.

It is an interprime number because it is at equal distance from previous prime (1312697231) and next prime (1312697233).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312697231) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19592463 + ... + 19592529.

It is an arithmetic number, because the mean of its divisors is an integer number (8094720).

Almost surely, 2^1312697232 is an apocalyptic number.

1312697232 is a gapful number since it is divisible by the number (12) 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 1312697232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2590310400).

1312697232 is an abundant number, since it is smaller than the sum of its proper divisors (3867923568).

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

1312697232 is a wasteful number, since it uses less digits than its factorization.

1312697232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 140 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1312697232 is about 36231.1638234269. The cubic root of 1312697232 is about 1094.9346254834.

The spelling of 1312697232 in words is "one billion, three hundred twelve million, six hundred ninety-seven thousand, two hundred thirty-two".