778244 has 12 divisors (see below), whose sum is σ = 1409100. Its totient is φ = 375648.

The previous prime is 778241. The next prime is 778247. The reversal of 778244 is 442877.

It is an interprime number because it is at equal distance from previous prime (778241) and next prime (778247).

It can be written as a sum of positive squares in 2 ways, for example, as 462400 + 315844 = 680^2 + 562^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 778244.

It is not an unprimeable number, because it can be changed into a prime (778241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3239 + ... + 3470.

It is an arithmetic number, because the mean of its divisors is an integer number (117425).

2⁷⁷⁸²⁴⁴ is an apocalyptic number.

It is an amenable number.

778244 is a deficient number, since it is larger than the sum of its proper divisors (630856).

778244 is a wasteful number, since it uses less digits than its factorization.

778244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742 (or 6740 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 778244 is about 882.1813872441. The cubic root of 778244 is about 91.9825108532.

The spelling of 778244 in words is "seven hundred seventy-eight thousand, two hundred forty-four".