13504220 has 48 divisors (see below), whose sum is σ = 30578688. Its totient is φ = 4994880.

The previous prime is 13504219. The next prime is 13504259. The reversal of 13504220 is 2240531.

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 15 ways as a sum of consecutive naturals, for example, 13787 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (637056).

Almost surely, 2^13504220 is an apocalyptic number.

13504220 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 13504220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15289344).

13504220 is an abundant number, since it is smaller than the sum of its proper divisors (17074468).

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

13504220 is a wasteful number, since it uses less digits than its factorization.

13504220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 13504220 is about 3674.8088385656. The cubic root of 13504220 is about 238.1349657010.

Adding to 13504220 its reverse (2240531), we get a palindrome (15744751).

It can be divided in two parts, 1350 and 4220, that multiplied together give a triangular number (5697000 = T₃₃₇₅).

The spelling of 13504220 in words is "thirteen million, five hundred four thousand, two hundred twenty".