13870656 has 112 divisors (see below), whose sum is σ = 42672000. Its totient is φ = 4409856.

The previous prime is 13870651. The next prime is 13870663. The reversal of 13870656 is 65607831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 13870656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39570 + ... + 39918.

It is an arithmetic number, because the mean of its divisors is an integer number (381000).

Almost surely, 2^13870656 is an apocalyptic number.

13870656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13870656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21336000).

13870656 is an abundant number, since it is smaller than the sum of its proper divisors (28801344).

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

13870656 is a wasteful number, since it uses less digits than its factorization.

13870656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 13870656 is about 3724.3329604105. The cubic root of 13870656 is about 240.2696968183.

The spelling of 13870656 in words is "thirteen million, eight hundred seventy thousand, six hundred fifty-six".