786428 has 12 divisors (see below), whose sum is σ = 1382472. Its totient is φ = 391440.

The previous prime is 786419. The next prime is 786431. The reversal of 786428 is 824687.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 1917.

It is an arithmetic number, because the mean of its divisors is an integer number (115206).

786428 is a Friedman number, since it can be written as (8^7*6)/(8*2)-4, using all its digits and the basic arithmetic operations.

2⁷⁸⁶⁴²⁸ is an apocalyptic number.

It is an amenable number.

786428 is a deficient number, since it is larger than the sum of its proper divisors (596044).

786428 is a wasteful number, since it uses less digits than its factorization.

786428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 786428 is about 886.8077581979. The cubic root of 786428 is about 92.3038160053.

The spelling of 786428 in words is "seven hundred eighty-six thousand, four hundred twenty-eight".