13540340 has 24 divisors (see below), whose sum is σ = 31020192. Its totient is φ = 4923680.

The previous prime is 13540333. The next prime is 13540367. The reversal of 13540340 is 4304531.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30554 + ... + 30993.

It is an arithmetic number, because the mean of its divisors is an integer number (1292508).

Almost surely, 2^13540340 is an apocalyptic number.

13540340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13540340 is an abundant number, since it is smaller than the sum of its proper divisors (17479852).

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

13540340 is a wasteful number, since it uses less digits than its factorization.

13540340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61567 (or 61565 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13540340 is about 3679.7200980509. The cubic root of 13540340 is about 238.3470914298.

Adding to 13540340 its reverse (4304531), we get a palindrome (17844871).

The spelling of 13540340 in words is "thirteen million, five hundred forty thousand, three hundred forty".