13379840 has 36 divisors (see below), whose sum is σ = 32051964. Its totient is φ = 5351424.

The previous prime is 13379827. The next prime is 13379851. The reversal of 13379840 is 4897331.

It can be written as a sum of positive squares in 2 ways, for example, as 9935104 + 3444736 = 3152^2 + 1856^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13379840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3947 + ... + 6506.

Almost surely, 2^13379840 is an apocalyptic number.

13379840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13379840 is an abundant number, since it is smaller than the sum of its proper divisors (18672124).

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

13379840 is an equidigital number, since it uses as much as digits as its factorization.

13379840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10474 (or 10460 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13379840 is about 3657.8463609069. The cubic root of 13379840 is about 237.4015991254.

The spelling of 13379840 in words is "thirteen million, three hundred seventy-nine thousand, eight hundred forty".