722388 has 24 divisors (see below), whose sum is σ = 1732192. Its totient is φ = 234144.

The previous prime is 722377. The next prime is 722389. The reversal of 722388 is 883227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722389) by changing a digit.

722388 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 7 ways as a sum of consecutive naturals, for example, 370 + ... + 1257.

2⁷²²³⁸⁸ is an apocalyptic number.

It is an amenable number.

722388 is an abundant number, since it is smaller than the sum of its proper divisors (1009804).

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

722388 is a wasteful number, since it uses less digits than its factorization.

722388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1669 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 722388 is about 849.9341150936. The cubic root of 722388 is about 89.7270744226.

The spelling of 722388 in words is "seven hundred twenty-two thousand, three hundred eighty-eight".