13132440 has 48 divisors (see below), whose sum is σ = 42681600. Its totient is φ = 3501888.

The previous prime is 13132417. The next prime is 13132487. The reversal of 13132440 is 4423131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17880 + ... + 18599.

It is an arithmetic number, because the mean of its divisors is an integer number (889200).

Almost surely, 2^13132440 is an apocalyptic number.

13132440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13132440 is an abundant number, since it is smaller than the sum of its proper divisors (29549160).

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

13132440 is a wasteful number, since it uses less digits than its factorization.

13132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36496 (or 36489 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13132440 is about 3623.8708586262. The cubic root of 13132440 is about 235.9292615722.

Adding to 13132440 its reverse (4423131), we get a palindrome (17555571).

The spelling of 13132440 in words is "thirteen million, one hundred thirty-two thousand, four hundred forty".