13209140 has 24 divisors (see below), whose sum is σ = 31702272. Its totient is φ = 4528800.

The previous prime is 13209139. The next prime is 13209151. The reversal of 13209140 is 4190231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47036 + ... + 47315.

It is an arithmetic number, because the mean of its divisors is an integer number (1320928).

Almost surely, 2^13209140 is an apocalyptic number.

13209140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13209140 is an abundant number, since it is smaller than the sum of its proper divisors (18493132).

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

13209140 is a wasteful number, since it uses less digits than its factorization.

13209140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94367 (or 94365 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13209140 is about 3634.4380583524. The cubic root of 13209140 is about 236.3876851091.

Adding to 13209140 its reverse (4190231), we get a palindrome (17399371).

The spelling of 13209140 in words is "thirteen million, two hundred nine thousand, one hundred forty".