13444557 has 16 divisors (see below), whose sum is σ = 20544000. Its totient is φ = 7661232.

The previous prime is 13444553. The next prime is 13444591. The reversal of 13444557 is 75544431.

13444557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13444557 - 2² = 13444553 is a prime.

It is a super-2 number, since 2×13444557² = 361512225852498, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444553) 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, 9838 + ... + 11120.

It is an arithmetic number, because the mean of its divisors is an integer number (1284000).

Almost surely, 2^13444557 is an apocalyptic number.

13444557 is the 2994-th pentagonal number.

It is an amenable number.

13444557 is a deficient number, since it is larger than the sum of its proper divisors (7099443).

13444557 is a wasteful number, since it uses less digits than its factorization.

13444557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its digits is 33600, while the sum is 33.

The square root of 13444557 is about 3666.6820151194. The cubic root of 13444557 is about 237.7837465546.

Adding to 13444557 its reverse (75544431), we get a palindrome (88988988).

The spelling of 13444557 in words is "thirteen million, four hundred forty-four thousand, five hundred fifty-seven".