13296640 has 132 divisors (see below), whose sum is σ = 37803996. Its totient is φ = 4472832.

The previous prime is 13296617. The next prime is 13296641. The reversal of 13296640 is 4669231.

It can be written as a sum of positive squares in 2 ways, for example, as 7225344 + 6071296 = 2688^2 + 2464^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13296641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250854 + ... + 250906.

Almost surely, 2^13296640 is an apocalyptic number.

13296640 is a gapful number since it is divisible by the number (10) 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 13296640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18901998).

13296640 is an abundant number, since it is smaller than the sum of its proper divisors (24507356).

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

13296640 is an equidigital number, since it uses as much as digits as its factorization.

13296640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13296640 is about 3646.4558135263. The cubic root of 13296640 is about 236.9084966658.

The spelling of 13296640 in words is "thirteen million, two hundred ninety-six thousand, six hundred forty".