13597220 has 96 divisors (see below), whose sum is σ = 36427776. Its totient is φ = 4147200.

The previous prime is 13597219. The next prime is 13597247. The reversal of 13597220 is 2279531.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 56300 + ... + 56540.

It is an arithmetic number, because the mean of its divisors is an integer number (379456).

Almost surely, 2^13597220 is an apocalyptic number.

13597220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13597220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18213888).

13597220 is an abundant number, since it is smaller than the sum of its proper divisors (22830556).

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

13597220 is a wasteful number, since it uses less digits than its factorization.

13597220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 13597220 is about 3687.4408469832. The cubic root of 13597220 is about 238.6803731435.

The spelling of 13597220 in words is "thirteen million, five hundred ninety-seven thousand, two hundred twenty".