13771356 has 12 divisors (see below), whose sum is σ = 32133192. Its totient is φ = 4590448.

The previous prime is 13771339. The next prime is 13771369. The reversal of 13771356 is 65317731.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573795 + ... + 573818.

It is an arithmetic number, because the mean of its divisors is an integer number (2677766).

Almost surely, 2^13771356 is an apocalyptic number.

It is an amenable number.

13771356 is an abundant number, since it is smaller than the sum of its proper divisors (18361836).

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

13771356 is a wasteful number, since it uses less digits than its factorization.

13771356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147620 (or 1147618 counting only the distinct ones).

The product of its digits is 13230, while the sum is 33.

The square root of 13771356 is about 3710.9777687289. The cubic root of 13771356 is about 239.6949596798.

The spelling of 13771356 in words is "thirteen million, seven hundred seventy-one thousand, three hundred fifty-six".