13780744 has 32 divisors (see below), whose sum is σ = 27643680. Its totient is φ = 6417664.

The previous prime is 13780733. The next prime is 13780747. The reversal of 13780744 is 44708731.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (13780747) 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, 14079 + ... + 15025.

It is an arithmetic number, because the mean of its divisors is an integer number (863865).

Almost surely, 2^13780744 is an apocalyptic number.

It is an amenable number.

13780744 is an abundant number, since it is smaller than the sum of its proper divisors (13862936).

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

13780744 is a wasteful number, since it uses less digits than its factorization.

13780744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 13780744 is about 3712.2424489788. The cubic root of 13780744 is about 239.7494143788.

The spelling of 13780744 in words is "thirteen million, seven hundred eighty thousand, seven hundred forty-four".