13640860 has 24 divisors (see below), whose sum is σ = 30154320. Its totient is φ = 5169024.

The previous prime is 13640849. The next prime is 13640867. The reversal of 13640860 is 6804631.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17569 + ... + 18328.

It is an arithmetic number, because the mean of its divisors is an integer number (1256430).

Almost surely, 2^13640860 is an apocalyptic number.

13640860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13640860 is an abundant number, since it is smaller than the sum of its proper divisors (16513460).

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

13640860 is a wasteful number, since it uses less digits than its factorization.

13640860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35925 (or 35923 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 13640860 is about 3693.3534897164. The cubic root of 13640860 is about 238.9354470479.

The spelling of 13640860 in words is "thirteen million, six hundred forty thousand, eight hundred sixty".