13640684 has 6 divisors (see below), whose sum is σ = 23871204. Its totient is φ = 6820340.

The previous prime is 13640677. The next prime is 13640699. The reversal of 13640684 is 48604631.

It is a self number, because there is not a number n which added to its sum of digits gives 13640684.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705082 + ... + 1705089.

It is an arithmetic number, because the mean of its divisors is an integer number (3978534).

Almost surely, 2^13640684 is an apocalyptic number.

It is an amenable number.

13640684 is a deficient number, since it is larger than the sum of its proper divisors (10230520).

13640684 is a wasteful number, since it uses less digits than its factorization.

13640684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410175 (or 3410173 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 13640684 is about 3693.3296630547. The cubic root of 13640684 is about 238.9344194289.

The spelling of 13640684 in words is "thirteen million, six hundred forty thousand, six hundred eighty-four".