13443738 has 48 divisors (see below), whose sum is σ = 34128864. Its totient is φ = 3491040.

The previous prime is 13443737. The next prime is 13443743. The reversal of 13443738 is 83734431.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13443699 and 13443708.

It is not an unprimeable number, because it can be changed into a prime (13443737) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1156 + ... + 5312.

It is an arithmetic number, because the mean of its divisors is an integer number (711018).

Almost surely, 2^13443738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13443738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17064432).

13443738 is an abundant number, since it is smaller than the sum of its proper divisors (20685126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13443738 is a wasteful number, since it uses less digits than its factorization.

13443738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 4180 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 13443738 is about 3666.5703320678. The cubic root of 13443738 is about 237.7789181113.

The spelling of 13443738 in words is "thirteen million, four hundred forty-three thousand, seven hundred thirty-eight".