13640346 has 32 divisors (see below), whose sum is σ = 31135680. Its totient is φ = 4423248.

The previous prime is 13640339. The next prime is 13640351. The reversal of 13640346 is 64304631.

13640346 is a `hidden beast` number, since 13 + 640 + 3 + 4 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1416 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (972990).

Almost surely, 2^13640346 is an apocalyptic number.

13640346 is an abundant number, since it is smaller than the sum of its proper divisors (17495334).

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

13640346 is a wasteful number, since it uses less digits than its factorization.

13640346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875 (or 6869 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 13640346 is about 3693.2839046031. The cubic root of 13640346 is about 238.9324459086.

Adding to 13640346 its reverse (64304631), we get a palindrome (77944977).

The spelling of 13640346 in words is "thirteen million, six hundred forty thousand, three hundred forty-six".