13640504 has 24 divisors (see below), whose sum is σ = 26110560. Its totient is φ = 6680544.

The previous prime is 13640491. The next prime is 13640509. The reversal of 13640504 is 40504631.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13640504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22169 + ... + 22775.

It is an arithmetic number, because the mean of its divisors is an integer number (1087940).

Almost surely, 2^13640504 is an apocalyptic number.

It is an amenable number.

13640504 is a deficient number, since it is larger than the sum of its proper divisors (12470056).

13640504 is an equidigital number, since it uses as much as digits as its factorization.

13640504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13640504 is about 3693.3052947191. The cubic root of 13640504 is about 238.9333684458.

The spelling of 13640504 in words is "thirteen million, six hundred forty thousand, five hundred four".