778028 has 6 divisors (see below), whose sum is σ = 1361556. Its totient is φ = 389012.

The previous prime is 778027. The next prime is 778049. The reversal of 778028 is 820877.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 777985 and 778003.

It is not an unprimeable number, because it can be changed into a prime (778027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97250 + ... + 97257.

It is an arithmetic number, because the mean of its divisors is an integer number (226926).

2⁷⁷⁸⁰²⁸ is an apocalyptic number.

It is an amenable number.

778028 is a deficient number, since it is larger than the sum of its proper divisors (583528).

778028 is a wasteful number, since it uses less digits than its factorization.

778028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194511 (or 194509 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 778028 is about 882.0589549458. The cubic root of 778028 is about 91.9740002144.

Subtracting 778028 from its reverse (820877), we obtain a square (42849 = 207²).

The spelling of 778028 in words is "seven hundred seventy-eight thousand, twenty-eight".