778366242 has 12 divisors (see below), whose sum is σ = 1686460230. Its totient is φ = 259455408.

The previous prime is 778366229. The next prime is 778366249. The reversal of 778366242 is 242663877.

778366242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 682306641 + 96059601 = 26121^2 + 9801^2 .

It is a super-3 number, since 3×778366242³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (778366249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21621267 + ... + 21621302.

Almost surely, 2^778366242 is an apocalyptic number.

778366242 is an abundant number, since it is smaller than the sum of its proper divisors (908093988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778366242 is a wasteful number, since it uses less digits than its factorization.

778366242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43242577 (or 43242574 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 778366242 is about 27899.2157954305. The cubic root of 778366242 is about 919.8732662541.

The spelling of 778366242 in words is "seven hundred seventy-eight million, three hundred sixty-six thousand, two hundred forty-two".