678922 has 8 divisors (see below), whose sum is σ = 1028772. Its totient is φ = 336000.

The previous prime is 678907. The next prime is 678941. The reversal of 678922 is 229876.

It can be written as a sum of positive squares in 2 ways, for example, as 564001 + 114921 = 751^2 + 339^2 .

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

It is an unprimeable number.

678922 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479 + ... + 1882.

2⁶⁷⁸⁹²² is an apocalyptic number.

678922 is a deficient number, since it is larger than the sum of its proper divisors (349850).

678922 is a wasteful number, since it uses less digits than its factorization.

678922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464.

The product of its digits is 12096, while the sum is 34.

The square root of 678922 is about 823.9672323582. The cubic root of 678922 is about 87.8901004114.

It can be divided in two parts, 678 and 922, that added together give a square (1600 = 40²).

The spelling of 678922 in words is "six hundred seventy-eight thousand, nine hundred twenty-two".