13380646 has 4 divisors (see below), whose sum is σ = 20070972. Its totient is φ = 6690322.

The previous prime is 13380599. The next prime is 13380659. The reversal of 13380646 is 64608331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64608331 = 907 ⋅71233.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345160 + ... + 3345163.

It is an arithmetic number, because the mean of its divisors is an integer number (5017743).

Almost surely, 2^13380646 is an apocalyptic number.

13380646 is a deficient number, since it is larger than the sum of its proper divisors (6690326).

13380646 is an equidigital number, since it uses as much as digits as its factorization.

13380646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690325.

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

The square root of 13380646 is about 3657.9565333667. The cubic root of 13380646 is about 237.4063660446.

Adding to 13380646 its reverse (64608331), we get a palindrome (77988977).

The spelling of 13380646 in words is "thirteen million, three hundred eighty thousand, six hundred forty-six".