677438 has 8 divisors (see below), whose sum is σ = 1033560. Its totient is φ = 332920.

The previous prime is 677423. The next prime is 677441. The reversal of 677438 is 834776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 677398 and 677407.

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 677438.

It is an unprimeable number.

677438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2753 + ... + 2988.

It is an arithmetic number, because the mean of its divisors is an integer number (129195).

2⁶⁷⁷⁴³⁸ is an apocalyptic number.

677438 is a deficient number, since it is larger than the sum of its proper divisors (356122).

677438 is a wasteful number, since it uses less digits than its factorization.

677438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802.

The product of its digits is 28224, while the sum is 35.

The square root of 677438 is about 823.0662184782. The cubic root of 677438 is about 87.8260164391.

The spelling of 677438 in words is "six hundred seventy-seven thousand, four hundred thirty-eight".