677798 has 8 divisors (see below), whose sum is σ = 1109160. Its totient is φ = 308080.

The previous prime is 677791. The next prime is 677813. The reversal of 677798 is 897776.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677791) by changing a digit.

677798 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, 15383 + ... + 15426.

It is an arithmetic number, because the mean of its divisors is an integer number (138645).

2⁶⁷⁷⁷⁹⁸ is an apocalyptic number.

677798 is a deficient number, since it is larger than the sum of its proper divisors (431362).

677798 is a wasteful number, since it uses less digits than its factorization.

677798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30822.

The product of its digits is 148176, while the sum is 44.

The square root of 677798 is about 823.2848838646. The cubic root of 677798 is about 87.8415710074.

The spelling of 677798 in words is "six hundred seventy-seven thousand, seven hundred ninety-eight".