13640329 has 8 divisors (see below), whose sum is σ = 13940000. Its totient is φ = 13343616.

The previous prime is 13640321. The next prime is 13640339. The reversal of 13640329 is 92304631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13640329 - 2³ = 13640321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13640297 and 13640306.

It is not an unprimeable number, because it can be changed into a prime (13640321) 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, 10297 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (1742500).

Almost surely, 2^13640329 is an apocalyptic number.

It is an amenable number.

13640329 is a deficient number, since it is larger than the sum of its proper divisors (299671).

13640329 is a wasteful number, since it uses less digits than its factorization.

13640329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479.

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

The square root of 13640329 is about 3693.2816031275. The cubic root of 13640329 is about 238.9323466479.

The spelling of 13640329 in words is "thirteen million, six hundred forty thousand, three hundred twenty-nine".