13400445 has 8 divisors (see below), whose sum is σ = 21440736. Its totient is φ = 7146896.

The previous prime is 13400441. The next prime is 13400447. The reversal of 13400445 is 54400431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13400445 - 2² = 13400441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446667 + ... + 446696.

It is an arithmetic number, because the mean of its divisors is an integer number (2680092).

Almost surely, 2^13400445 is an apocalyptic number.

13400445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13400445 is a deficient number, since it is larger than the sum of its proper divisors (8040291).

13400445 is an equidigital number, since it uses as much as digits as its factorization.

13400445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893371.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 13400445 is about 3660.6618254081. The cubic root of 13400445 is about 237.5234030493.

Adding to 13400445 its reverse (54400431), we get a palindrome (67800876).

The spelling of 13400445 in words is "thirteen million, four hundred thousand, four hundred forty-five".