677428 has 12 divisors (see below), whose sum is σ = 1193920. Its totient is φ = 336312.

The previous prime is 677423. The next prime is 677441. The reversal of 677428 is 824776.

It is a junction number, because it is equal to n+sod(n) for n = 677393 and 677402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677423) 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, 133 + ... + 1171.

2⁶⁷⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

677428 is a deficient number, since it is larger than the sum of its proper divisors (516492).

677428 is a wasteful number, since it uses less digits than its factorization.

677428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1204 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 677428 is about 823.0601436104. The cubic root of 677428 is about 87.8255842891.

The spelling of 677428 in words is "six hundred seventy-seven thousand, four hundred twenty-eight".