13391340 has 48 divisors (see below), whose sum is σ = 37669632. Its totient is φ = 3554496.

The previous prime is 13391327. The next prime is 13391341. The reversal of 13391340 is 4319331.

It is a self number, because there is not a number n which added to its sum of digits gives 13391340.

It is not an unprimeable number, because it can be changed into a prime (13391341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18057 + ... + 18783.

It is an arithmetic number, because the mean of its divisors is an integer number (784784).

Almost surely, 2^13391340 is an apocalyptic number.

13391340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13391340 is an abundant number, since it is smaller than the sum of its proper divisors (24278292).

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

13391340 is a wasteful number, since it uses less digits than its factorization.

13391340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 13391340 is about 3659.4179865110. The cubic root of 13391340 is about 237.4695953691.

It can be divided in two parts, 13391 and 340, that added together give a palindrome (13731).

The spelling of 13391340 in words is "thirteen million, three hundred ninety-one thousand, three hundred forty".