722616 has 16 divisors (see below), whose sum is σ = 1806600. Its totient is φ = 240864.

The previous prime is 722611. The next prime is 722633. The reversal of 722616 is 616227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 30109 = 722616 / (7 + 2 + 2 + 6 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722611) 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, 15031 + ... + 15078.

2⁷²²⁶¹⁶ is an apocalyptic number.

It is an amenable number.

722616 is an abundant number, since it is smaller than the sum of its proper divisors (1083984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722616 is a wasteful number, since it uses less digits than its factorization.

722616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30118 (or 30114 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 722616 is about 850.0682325555. The cubic root of 722616 is about 89.7365133119.

The spelling of 722616 in words is "seven hundred twenty-two thousand, six hundred sixteen".