13620355 has 16 divisors (see below), whose sum is σ = 18869184. Its totient is φ = 9244800.

The previous prime is 13620317. The next prime is 13620407. The reversal of 13620355 is 55302631.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13620355 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (1179324).

Almost surely, 2^13620355 is an apocalyptic number.

13620355 is a deficient number, since it is larger than the sum of its proper divisors (5248829).

13620355 is a wasteful number, since it uses less digits than its factorization.

13620355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 13620355 is about 3690.5765132293. The cubic root of 13620355 is about 238.8156640745.

Adding to 13620355 its reverse (55302631), we get a palindrome (68922986).

The spelling of 13620355 in words is "thirteen million, six hundred twenty thousand, three hundred fifty-five".