13620306 has 16 divisors (see below), whose sum is σ = 31132224. Its totient is φ = 3891504.

The previous prime is 13620287. The next prime is 13620317. The reversal of 13620306 is 60302631.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 7 ways as a sum of consecutive naturals, for example, 162105 + ... + 162188.

It is an arithmetic number, because the mean of its divisors is an integer number (1945764).

Almost surely, 2^13620306 is an apocalyptic number.

13620306 is an abundant number, since it is smaller than the sum of its proper divisors (17511918).

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

13620306 is a wasteful number, since it uses less digits than its factorization.

13620306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324305.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13620306 is about 3690.5698746942. The cubic root of 13620306 is about 238.8153776898.

Adding to 13620306 its reverse (60302631), we get a palindrome (73922937).

The spelling of 13620306 in words is "thirteen million, six hundred twenty thousand, three hundred six".