13866538 has 16 divisors (see below), whose sum is σ = 24018624. Its totient is φ = 5880960.

The previous prime is 13866533. The next prime is 13866547. The reversal of 13866538 is 83566831.

13866538 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13866538² = 384561752210888, which contains 22 as substring.

13866538 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 13866538.

It is not an unprimeable number, because it can be changed into a prime (13866533) 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, 3748 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (1501164).

Almost surely, 2^13866538 is an apocalyptic number.

13866538 is a deficient number, since it is larger than the sum of its proper divisors (10152086).

13866538 is a wasteful number, since it uses less digits than its factorization.

13866538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317.

The product of its digits is 103680, while the sum is 40.

The square root of 13866538 is about 3723.7800686936. The cubic root of 13866538 is about 240.2459169157.

The spelling of 13866538 in words is "thirteen million, eight hundred sixty-six thousand, five hundred thirty-eight".