13373440 has 52 divisors (see below), whose sum is σ = 32141484. Its totient is φ = 5341184.

The previous prime is 13373429. The next prime is 13373443. The reversal of 13373440 is 4437331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 9437184 = 1984^2 + 3072^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13373443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20154 + ... + 20806.

Almost surely, 2^13373440 is an apocalyptic number.

13373440 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 13373440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16070742).

13373440 is an abundant number, since it is smaller than the sum of its proper divisors (18768044).

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

13373440 is an frugal number, since it uses more digits than its factorization.

13373440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 13373440 is about 3656.9714245534. The cubic root of 13373440 is about 237.3637408612.

The spelling of 13373440 in words is "thirteen million, three hundred seventy-three thousand, four hundred forty".