13040340 has 24 divisors (see below), whose sum is σ = 36513120. Its totient is φ = 3477408.

The previous prime is 13040323. The next prime is 13040341. The reversal of 13040340 is 4304031.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040341) 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, 108610 + ... + 108729.

It is an arithmetic number, because the mean of its divisors is an integer number (1521380).

Almost surely, 2^13040340 is an apocalyptic number.

13040340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13040340 is an abundant number, since it is smaller than the sum of its proper divisors (23472780).

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

13040340 is a wasteful number, since it uses less digits than its factorization.

13040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217351 (or 217349 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13040340 is about 3611.1410938926. The cubic root of 13040340 is about 235.3764300495.

Adding to 13040340 its reverse (4304031), we get a palindrome (17344371).

It can be divided in two parts, 130 and 40340, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 13040340 in words is "thirteen million, forty thousand, three hundred forty".