13599220 has 12 divisors (see below), whose sum is σ = 28558404. Its totient is φ = 5439680.

The previous prime is 13599199. The next prime is 13599221. The reversal of 13599220 is 2299531.

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 11209104 = 1546^2 + 3348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13599221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 339961 + ... + 340000.

It is an arithmetic number, because the mean of its divisors is an integer number (2379867).

Almost surely, 2^13599220 is an apocalyptic number.

13599220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13599220 is an abundant number, since it is smaller than the sum of its proper divisors (14959184).

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

13599220 is a wasteful number, since it uses less digits than its factorization.

13599220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679970 (or 679968 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13599220 is about 3687.7120278026. The cubic root of 13599220 is about 238.6920749801.

The spelling of 13599220 in words is "thirteen million, five hundred ninety-nine thousand, two hundred twenty".