13870540 has 12 divisors (see below), whose sum is σ = 29128176. Its totient is φ = 5548208.

The previous prime is 13870537. The next prime is 13870543. The reversal of 13870540 is 4507831.

It is an interprime number because it is at equal distance from previous prime (13870537) and next prime (13870543).

It is a junction number, because it is equal to n+sod(n) for n = 13870499 and 13870508.

It is not an unprimeable number, because it can be changed into a prime (13870543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346744 + ... + 346783.

It is an arithmetic number, because the mean of its divisors is an integer number (2427348).

Almost surely, 2^13870540 is an apocalyptic number.

13870540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13870540 is an abundant number, since it is smaller than the sum of its proper divisors (15257636).

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

13870540 is a wasteful number, since it uses less digits than its factorization.

13870540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693536 (or 693534 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13870540 is about 3724.3173871194. The cubic root of 13870540 is about 240.2690270263.

The spelling of 13870540 in words is "thirteen million, eight hundred seventy thousand, five hundred forty".