678722 has 8 divisors (see below), whose sum is σ = 1110672. Its totient is φ = 308500.

The previous prime is 678721. The next prime is 678731. The reversal of 678722 is 227876.

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

It is not an unprimeable number, because it can be changed into a prime (678721) 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, 15404 + ... + 15447.

It is an arithmetic number, because the mean of its divisors is an integer number (138834).

2⁶⁷⁸⁷²² is an apocalyptic number.

678722 is a deficient number, since it is larger than the sum of its proper divisors (431950).

678722 is a wasteful number, since it uses less digits than its factorization.

678722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30864.

The product of its digits is 9408, while the sum is 32.

The square root of 678722 is about 823.8458593693. The cubic root of 678722 is about 87.8814692056.

The spelling of 678722 in words is "six hundred seventy-eight thousand, seven hundred twenty-two".