13232640 has 80 divisors (see below), whose sum is σ = 42327648. Its totient is φ = 3526656.

The previous prime is 13232633. The next prime is 13232641. The reversal of 13232640 is 4623231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13232640² = 350205522739200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13232641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6819 + ... + 8541.

Almost surely, 2^13232640 is an apocalyptic number.

13232640 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 13232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21163824).

13232640 is an abundant number, since it is smaller than the sum of its proper divisors (29095008).

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

13232640 is an equidigital number, since it uses as much as digits as its factorization.

13232640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 13232640 is about 3637.6695836758. The cubic root of 13232640 is about 236.5277855633.

Adding to 13232640 its reverse (4623231), we get a palindrome (17855871).

The spelling of 13232640 in words is "thirteen million, two hundred thirty-two thousand, six hundred forty".