13860439 has 4 divisors (see below), whose sum is σ = 13889160. Its totient is φ = 13831720.

The previous prime is 13860391. The next prime is 13860449. The reversal of 13860439 is 93406831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13860439 - 2¹³ = 13852247 is a prime.

It is a super-2 number, since 2×13860439² = 384223538545442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13860449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13624 + ... + 14605.

It is an arithmetic number, because the mean of its divisors is an integer number (3472290).

Almost surely, 2^13860439 is an apocalyptic number.

13860439 is a deficient number, since it is larger than the sum of its proper divisors (28721).

13860439 is an equidigital number, since it uses as much as digits as its factorization.

13860439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28720.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 13860439 is about 3722.9610527106. The cubic root of 13860439 is about 240.2106888310.

The spelling of 13860439 in words is "thirteen million, eight hundred sixty thousand, four hundred thirty-nine".