13508420 has 24 divisors (see below), whose sum is σ = 28690200. Its totient is φ = 5341952.

The previous prime is 13508413. The next prime is 13508423. The reversal of 13508420 is 2480531.

13508420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 13075456 = 658^2 + 3616^2 .

It is not an unprimeable number, because it can be changed into a prime (13508423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015 + ... + 5574.

It is an arithmetic number, because the mean of its divisors is an integer number (1195425).

Almost surely, 2^13508420 is an apocalyptic number.

13508420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13508420 is an abundant number, since it is smaller than the sum of its proper divisors (15181780).

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

13508420 is a wasteful number, since it uses less digits than its factorization.

13508420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687 (or 7685 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13508420 is about 3675.3802524365. The cubic root of 13508420 is about 238.1596509027.

Adding to 13508420 its reverse (2480531), we get a palindrome (15988951).

The spelling of 13508420 in words is "thirteen million, five hundred eight thousand, four hundred twenty".