744449638 has 16 divisors (see below), whose sum is σ = 1141548480. Its totient is φ = 363949056.

The previous prime is 744449609. The next prime is 744449653. The reversal of 744449638 is 836944447.

It is a junction number, because it is equal to n+sod(n) for n = 744449591 and 744449600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110758 + ... + 117286.

It is an arithmetic number, because the mean of its divisors is an integer number (71346780).

Almost surely, 2^744449638 is an apocalyptic number.

744449638 is a deficient number, since it is larger than the sum of its proper divisors (397098842).

744449638 is a wasteful number, since it uses less digits than its factorization.

744449638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7791.

The product of its digits is 2322432, while the sum is 49.

The square root of 744449638 is about 27284.6044134783. The cubic root of 744449638 is about 906.3134831914.

The spelling of 744449638 in words is "seven hundred forty-four million, four hundred forty-nine thousand, six hundred thirty-eight".