13400144 has 10 divisors (see below), whose sum is σ = 25962810. Its totient is φ = 6700064.

The previous prime is 13400143. The next prime is 13400147. The reversal of 13400144 is 44100431.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 150544 = 3640^2 + 388^2 .

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418739 + ... + 418770.

It is an arithmetic number, because the mean of its divisors is an integer number (2596281).

Almost surely, 2^13400144 is an apocalyptic number.

It is an amenable number.

13400144 is a deficient number, since it is larger than the sum of its proper divisors (12562666).

13400144 is an equidigital number, since it uses as much as digits as its factorization.

13400144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837517 (or 837511 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 13400144 is about 3660.6207123929. The cubic root of 13400144 is about 237.5216246238.

Adding to 13400144 its reverse (44100431), we get a palindrome (57500575).

The spelling of 13400144 in words is "thirteen million, four hundred thousand, one hundred forty-four".