744778 has 8 divisors (see below), whose sum is σ = 1155780. Its totient is φ = 359520.

The previous prime is 744767. The next prime is 744791. The reversal of 744778 is 877447.

It can be written as a sum of positive squares in 2 ways, for example, as 744769 + 9 = 863^2 + 3^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6363 + ... + 6478.

2⁷⁴⁴⁷⁷⁸ is an apocalyptic number.

744778 is a deficient number, since it is larger than the sum of its proper divisors (411002).

744778 is a wasteful number, since it uses less digits than its factorization.

744778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12872.

The product of its digits is 43904, while the sum is 37.

The square root of 744778 is about 863.0052143527. The cubic root of 744778 is about 90.6446715917.

The spelling of 744778 in words is "seven hundred forty-four thousand, seven hundred seventy-eight".