13840356 has 24 divisors (see below), whose sum is σ = 32366880. Its totient is φ = 4603072.

The previous prime is 13840349. The next prime is 13840357. The reversal of 13840356 is 65304831.

It is not an unprimeable number, because it can be changed into a prime (13840357) 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, 5815 + ... + 7841.

It is an arithmetic number, because the mean of its divisors is an integer number (1348620).

Almost surely, 2^13840356 is an apocalyptic number.

It is an amenable number.

13840356 is an abundant number, since it is smaller than the sum of its proper divisors (18526524).

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

13840356 is a wasteful number, since it uses less digits than its factorization.

13840356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603 (or 2601 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13840356 is about 3720.2628939364. The cubic root of 13840356 is about 240.0946154725.

It can be divided in two parts, 13840 and 356, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13840356 in words is "thirteen million, eight hundred forty thousand, three hundred fifty-six".