13538444 has 48 divisors (see below), whose sum is σ = 26320896. Its totient is φ = 6072000.

The previous prime is 13538429. The next prime is 13538453. The reversal of 13538444 is 44483531.

It is a super-2 number, since 2×13538444² = 366578931882272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13538444.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 133994 + ... + 134094.

It is an arithmetic number, because the mean of its divisors is an integer number (548352).

Almost surely, 2^13538444 is an apocalyptic number.

It is an amenable number.

13538444 is a deficient number, since it is larger than the sum of its proper divisors (12782452).

13538444 is a wasteful number, since it uses less digits than its factorization.

13538444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 204 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 13538444 is about 3679.4624607407. The cubic root of 13538444 is about 238.3359659785.

The spelling of 13538444 in words is "thirteen million, five hundred thirty-eight thousand, four hundred forty-four".