722790 has 32 divisors (see below), whose sum is σ = 1928160. Its totient is φ = 192672.

The previous prime is 722783. The next prime is 722791. The reversal of 722790 is 97227.

722790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722791) by changing a digit.

722790 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (60255).

2⁷²²⁷⁹⁰ is an apocalyptic number.

722790 is an abundant number, since it is smaller than the sum of its proper divisors (1205370).

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

722790 is a wasteful number, since it uses less digits than its factorization.

722790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 722790 is about 850.1705711209. The cubic root of 722790 is about 89.7437153391.

The spelling of 722790 in words is "seven hundred twenty-two thousand, seven hundred ninety".