722678 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 324360.

The previous prime is 722669. The next prime is 722713. The reversal of 722678 is 876227.

It is a congruent number.

It is an unprimeable number.

722678 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 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁷²²⁶⁷⁸ is an apocalyptic number.

722678 is a deficient number, since it is larger than the sum of its proper divisors (474826).

722678 is a wasteful number, since it uses less digits than its factorization.

722678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

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

The square root of 722678 is about 850.1046994341. The cubic root of 722678 is about 89.7390796840.

The spelling of 722678 in words is "seven hundred twenty-two thousand, six hundred seventy-eight".