13780344 has 16 divisors (see below), whose sum is σ = 34450920. Its totient is φ = 4593440.

The previous prime is 13780331. The next prime is 13780369. The reversal of 13780344 is 44308731.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287067 + ... + 287114.

Almost surely, 2^13780344 is an apocalyptic number.

It is an amenable number.

13780344 is an abundant number, since it is smaller than the sum of its proper divisors (20670576).

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

13780344 is a wasteful number, since it uses less digits than its factorization.

13780344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574190 (or 574186 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 13780344 is about 3712.1885727964. The cubic root of 13780344 is about 239.7470947002.

The spelling of 13780344 in words is "thirteen million, seven hundred eighty thousand, three hundred forty-four".