722630 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 286272.

The previous prime is 722611. The next prime is 722633. The reversal of 722630 is 36227.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2⁷²²⁶³⁰ is an apocalyptic number.

722630 is a deficient number, since it is larger than the sum of its proper divisors (590650).

722630 is a wasteful number, since it uses less digits than its factorization.

722630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 722630 is about 850.0764671487. The cubic root of 722630 is about 89.7370928281.

Adding to 722630 its reverse (36227), we get a palindrome (758857).

The spelling of 722630 in words is "seven hundred twenty-two thousand, six hundred thirty".