722686 has 8 divisors (see below), whose sum is σ = 1091664. Its totient is φ = 358800.

The previous prime is 722669. The next prime is 722713. The reversal of 722686 is 686227.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (136458).

2⁷²²⁶⁸⁶ is an apocalyptic number.

722686 is a deficient number, since it is larger than the sum of its proper divisors (368978).

722686 is a wasteful number, since it uses less digits than its factorization.

722686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546.

The product of its digits is 8064, while the sum is 31.

The square root of 722686 is about 850.1094047239. The cubic root of 722686 is about 89.7394108181.

The spelling of 722686 in words is "seven hundred twenty-two thousand, six hundred eighty-six".