744040042 has 4 divisors (see below), whose sum is σ = 1116060066. Its totient is φ = 372020020.

The previous prime is 744040039. The next prime is 744040049. The reversal of 744040042 is 240040447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 382241601 + 361798441 = 19551^2 + 19021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 744039989 and 744040016.

It is not an unprimeable number, because it can be changed into a prime (744040049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186010009 + ... + 186010012.

Almost surely, 2^744040042 is an apocalyptic number.

744040042 is a deficient number, since it is larger than the sum of its proper divisors (372020024).

744040042 is a wasteful number, since it uses less digits than its factorization.

744040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372020023.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 744040042 is about 27277.0973895684. The cubic root of 744040042 is about 906.1472348824.

Adding to 744040042 its reverse (240040447), we get a palindrome (984080489).

The spelling of 744040042 in words is "seven hundred forty-four million, forty thousand, forty-two".