13966520 has 128 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 4663296.

The previous prime is 13966483. The next prime is 13966553. The reversal of 13966520 is 2566931.

It is a happy number.

13966520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297137 + ... + 297183.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^13966520 is an apocalyptic number.

13966520 is a gapful number since it is divisible by the number (10) 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 13966520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18662400).

13966520 is an abundant number, since it is smaller than the sum of its proper divisors (23358280).

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

13966520 is a wasteful number, since it uses less digits than its factorization.

13966520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 13966520 is about 3737.1807555964. The cubic root of 13966520 is about 240.8219502954.

The spelling of 13966520 in words is "thirteen million, nine hundred sixty-six thousand, five hundred twenty".