778204 has 12 divisors (see below), whose sum is σ = 1556464. Its totient is φ = 333504.

The previous prime is 778201. The next prime is 778213. The reversal of 778204 is 402877.

778204 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 27793 = 778204 / (7 + 7 + 8 + 2 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13869 + ... + 13924.

2⁷⁷⁸²⁰⁴ is an apocalyptic number.

It is an amenable number.

778204 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.

778204 is a wasteful number, since it uses less digits than its factorization.

778204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27804 (or 27802 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 778204 is about 882.1587158783. The cubic root of 778204 is about 91.9809349278.

It can be divided in two parts, 77 and 8204, that added together give a square (8281 = 91²).

The spelling of 778204 in words is "seven hundred seventy-eight thousand, two hundred four".