13887040 has 28 divisors (see below), whose sum is σ = 33069276. Its totient is φ = 5554688.

The previous prime is 13887019. The next prime is 13887061. The reversal of 13887040 is 4078831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13887019) and next prime (13887061).

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 4596736 = 3048^2 + 2144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13886993 and 13887011.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21379 + ... + 22018.

Almost surely, 2^13887040 is an apocalyptic number.

13887040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13887040 is an abundant number, since it is smaller than the sum of its proper divisors (19182236).

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

13887040 is an equidigital number, since it uses as much as digits as its factorization.

13887040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43414 (or 43404 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 13887040 is about 3726.5318997695. The cubic root of 13887040 is about 240.3642616744.

It can be divided in two parts, 138 and 87040, that added together give a palindrome (87178).

The spelling of 13887040 in words is "thirteen million, eight hundred eighty-seven thousand, forty".