13220346 has 16 divisors (see below), whose sum is σ = 27352800. Its totient is φ = 4254768.

The previous prime is 13220329. The next prime is 13220351. The reversal of 13220346 is 64302231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37816 + ... + 38163.

It is an arithmetic number, because the mean of its divisors is an integer number (1709550).

Almost surely, 2^13220346 is an apocalyptic number.

13220346 is an abundant number, since it is smaller than the sum of its proper divisors (14132454).

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

13220346 is a wasteful number, since it uses less digits than its factorization.

13220346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76013.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 13220346 is about 3635.9793728788. The cubic root of 13220346 is about 236.4545128680.

Adding to 13220346 its reverse (64302231), we get a palindrome (77522577).

The spelling of 13220346 in words is "thirteen million, two hundred twenty thousand, three hundred forty-six".