744436138 has 8 divisors (see below), whose sum is σ = 1119468132. Its totient is φ = 371280096.

The previous prime is 744436117. The next prime is 744436141. The reversal of 744436138 is 831634447.

It can be written as a sum of positive squares in 2 ways, for example, as 639230089 + 105206049 = 25283^2 + 10257^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 744436138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467995 + ... + 469582.

Almost surely, 2^744436138 is an apocalyptic number.

744436138 is a deficient number, since it is larger than the sum of its proper divisors (375031994).

744436138 is a wasteful number, since it uses less digits than its factorization.

744436138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937976.

The product of its digits is 193536, while the sum is 40.

The square root of 744436138 is about 27284.3570200949. The cubic root of 744436138 is about 906.3080047344.

The spelling of 744436138 in words is "seven hundred forty-four million, four hundred thirty-six thousand, one hundred thirty-eight".