13644940 has 12 divisors (see below), whose sum is σ = 28654416. Its totient is φ = 5457968.

The previous prime is 13644937. The next prime is 13644979. The reversal of 13644940 is 4944631.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341104 + ... + 341143.

It is an arithmetic number, because the mean of its divisors is an integer number (2387868).

Almost surely, 2^13644940 is an apocalyptic number.

13644940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13644940 is an abundant number, since it is smaller than the sum of its proper divisors (15009476).

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

13644940 is a wasteful number, since it uses less digits than its factorization.

13644940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682256 (or 682254 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13644940 is about 3693.9057919768. The cubic root of 13644940 is about 238.9592666469.

The spelling of 13644940 in words is "thirteen million, six hundred forty-four thousand, nine hundred forty".