13275240 has 128 divisors (see below), whose sum is σ = 44323200. Its totient is φ = 3153920.

The previous prime is 13275221. The next prime is 13275253. The reversal of 13275240 is 4257231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13275240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117424 + ... + 117536.

It is an arithmetic number, because the mean of its divisors is an integer number (346275).

Almost surely, 2^13275240 is an apocalyptic number.

13275240 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 13275240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22161600).

13275240 is an abundant number, since it is smaller than the sum of its proper divisors (31047960).

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

13275240 is a wasteful number, since it uses less digits than its factorization.

13275240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 13275240 is about 3643.5202757773. The cubic root of 13275240 is about 236.7813326075.

Subtracting from 13275240 its reverse (4257231), we obtain a square (9018009 = 3003²).

The spelling of 13275240 in words is "thirteen million, two hundred seventy-five thousand, two hundred forty".