13870040 has 16 divisors (see below), whose sum is σ = 31207680. Its totient is φ = 5548000.

The previous prime is 13870039. The next prime is 13870049. The reversal of 13870040 is 4007831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13869988 and 13870015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870049) 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, 173336 + ... + 173415.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^13870040 is an apocalyptic number.

13870040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13870040 is an abundant number, since it is smaller than the sum of its proper divisors (17337640).

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

13870040 is a wasteful number, since it uses less digits than its factorization.

13870040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346762 (or 346758 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 13870040 is about 3724.2502601195. The cubic root of 13870040 is about 240.2661399491.

Adding to 13870040 its reverse (4007831), we get a palindrome (17877871).

The spelling of 13870040 in words is "thirteen million, eight hundred seventy thousand, forty".