744538 has 4 divisors (see below), whose sum is σ = 1116810. Its totient is φ = 372268.

The previous prime is 744511. The next prime is 744539. The reversal of 744538 is 835447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835447 = 43 ⋅19429.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 356409 = 623^2 + 597^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (744539) 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 as a sum of consecutive naturals, namely, 186133 + ... + 186136.

2⁷⁴⁴⁵³⁸ is an apocalyptic number.

744538 is a deficient number, since it is larger than the sum of its proper divisors (372272).

744538 is a wasteful number, since it uses less digits than its factorization.

744538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372271.

The product of its digits is 13440, while the sum is 31.

The square root of 744538 is about 862.8661541630. The cubic root of 744538 is about 90.6349339883.

Subtracting 744538 from its reverse (835447), we obtain a palindrome (90909).

The spelling of 744538 in words is "seven hundred forty-four thousand, five hundred thirty-eight".