13402444 has 18 divisors (see below), whose sum is σ = 25781252. Its totient is φ = 6091800.

The previous prime is 13402427. The next prime is 13402453. The reversal of 13402444 is 44420431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13362 + ... + 14329.

Almost surely, 2^13402444 is an apocalyptic number.

It is an amenable number.

13402444 is a deficient number, since it is larger than the sum of its proper divisors (12378808).

13402444 is a wasteful number, since it uses less digits than its factorization.

13402444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27717 (or 27704 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 13402444 is about 3660.9348532854. The cubic root of 13402444 is about 237.5352132460.

Adding to 13402444 its reverse (44420431), we get a palindrome (57822875).

The spelling of 13402444 in words is "thirteen million, four hundred two thousand, four hundred forty-four".