13620439 has 16 divisors (see below), whose sum is σ = 16773120. Its totient is φ = 10802880.

The previous prime is 13620421. The next prime is 13620457. The reversal of 13620439 is 93402631.

It is an interprime number because it is at equal distance from previous prime (13620421) and next prime (13620457).

It is not a de Polignac number, because 13620439 - 2⁵ = 13620407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3627 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^13620439 is an apocalyptic number.

13620439 is a deficient number, since it is larger than the sum of its proper divisors (3152681).

13620439 is a wasteful number, since it uses less digits than its factorization.

13620439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 13620439 is about 3690.5878935476. The cubic root of 13620439 is about 238.8161550180.

The spelling of 13620439 in words is "thirteen million, six hundred twenty thousand, four hundred thirty-nine".