777428 has 12 divisors (see below), whose sum is σ = 1367520. Its totient is φ = 386712.

The previous prime is 777421. The next prime is 777431. The reversal of 777428 is 824777.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 777428.

It is not an unprimeable number, because it can be changed into a prime (777421) 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, 683 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (113960).

2⁷⁷⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

777428 is a deficient number, since it is larger than the sum of its proper divisors (590092).

777428 is a wasteful number, since it uses less digits than its factorization.

777428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1004 counting only the distinct ones).

The product of its digits is 21952, while the sum is 35.

The square root of 777428 is about 881.7187760278. The cubic root of 777428 is about 91.9503512832.

The spelling of 777428 in words is "seven hundred seventy-seven thousand, four hundred twenty-eight".