13656764 has 24 divisors (see below), whose sum is σ = 26213376. Its totient is φ = 6174000.

The previous prime is 13656761. The next prime is 13656781. The reversal of 13656764 is 46765631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656761) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8549 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (1092224).

Almost surely, 2^13656764 is an apocalyptic number.

It is an amenable number.

13656764 is a deficient number, since it is larger than the sum of its proper divisors (12556612).

13656764 is a wasteful number, since it uses less digits than its factorization.

13656764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1695 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 13656764 is about 3695.5059193566. The cubic root of 13656764 is about 239.0282699705.

It can be divided in two parts, 136567 and 64, that added together give a palindrome (136631).

The spelling of 13656764 in words is "thirteen million, six hundred fifty-six thousand, seven hundred sixty-four".