13400140 has 24 divisors (see below), whose sum is σ = 30305520. Its totient is φ = 4947648.

The previous prime is 13400129. The next prime is 13400141. The reversal of 13400140 is 4100431.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 13400140.

It is not an unprimeable number, because it can be changed into a prime (13400141) by changing a digit.

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, 25510 + ... + 26029.

It is an arithmetic number, because the mean of its divisors is an integer number (1262730).

Almost surely, 2^13400140 is an apocalyptic number.

13400140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13400140 is an abundant number, since it is smaller than the sum of its proper divisors (16905380).

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

13400140 is a wasteful number, since it uses less digits than its factorization.

13400140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51561 (or 51559 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13400140 is about 3660.6201660374. The cubic root of 13400140 is about 237.5216009901.

Adding to 13400140 its reverse (4100431), we get a palindrome (17500571).

The spelling of 13400140 in words is "thirteen million, four hundred thousand, one hundred forty".