13780916 has 12 divisors (see below), whose sum is σ = 24948420. Its totient is φ = 6652800.

The previous prime is 13780903. The next prime is 13780919. The reversal of 13780916 is 61908731.

13780916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3984016 + 9796900 = 1996^2 + 3130^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59285 + ... + 59516.

It is an arithmetic number, because the mean of its divisors is an integer number (2079035).

Almost surely, 2^13780916 is an apocalyptic number.

It is an amenable number.

13780916 is a deficient number, since it is larger than the sum of its proper divisors (11167504).

13780916 is a wasteful number, since it uses less digits than its factorization.

13780916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118834 (or 118832 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 13780916 is about 3712.2656154968. The cubic root of 13780916 is about 239.7504118269.

The spelling of 13780916 in words is "thirteen million, seven hundred eighty thousand, nine hundred sixteen".