13720226 has 8 divisors (see below), whose sum is σ = 22163484. Its totient is φ = 6332400.

The previous prime is 13720211. The next prime is 13720247. The reversal of 13720226 is 62202731.

It can be written as a sum of positive squares in 2 ways, for example, as 13359025 + 361201 = 3655^2 + 601^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 263825 + ... + 263876.

Almost surely, 2^13720226 is an apocalyptic number.

13720226 is a deficient number, since it is larger than the sum of its proper divisors (8443258).

13720226 is a wasteful number, since it uses less digits than its factorization.

13720226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527716.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 13720226 is about 3704.0823424973. The cubic root of 13720226 is about 239.3979469988.

Adding to 13720226 its reverse (62202731), we get a palindrome (75922957).

The spelling of 13720226 in words is "thirteen million, seven hundred twenty thousand, two hundred twenty-six".