778422 has 8 divisors (see below), whose sum is σ = 1556856. Its totient is φ = 259472.

The previous prime is 778417. The next prime is 778439. The reversal of 778422 is 224877.

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

778422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 778422.

It is a congruent number.

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, 64863 + ... + 64874.

It is an arithmetic number, because the mean of its divisors is an integer number (194607).

2⁷⁷⁸⁴²² is an apocalyptic number.

778422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

778422 is a wasteful number, since it uses less digits than its factorization.

778422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129742.

The product of its digits is 6272, while the sum is 30.

The square root of 778422 is about 882.2822677579. The cubic root of 778422 is about 91.9895230665.

The spelling of 778422 in words is "seven hundred seventy-eight thousand, four hundred twenty-two".