722889 has 12 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 466200.

The previous prime is 722881. The next prime is 722899. The reversal of 722889 is 988227.

722889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 722889 - 2³ = 722881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1017 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2⁷²²⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

722889 is a deficient number, since it is larger than the sum of its proper divisors (355383).

722889 is a wasteful number, since it uses less digits than its factorization.

722889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2625 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 722889 is about 850.2287927376. The cubic root of 722889 is about 89.7478125283.

The spelling of 722889 in words is "seven hundred twenty-two thousand, eight hundred eighty-nine".