722458 has 8 divisors (see below), whose sum is σ = 1182240. Its totient is φ = 328380.

The previous prime is 722431. The next prime is 722459. The reversal of 722458 is 854227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 7² + 2¹⁶ + 4⁶ + 2¹⁸ + 5⁸ + 8 .

It is not an unprimeable number, because it can be changed into a prime (722459) 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, 16398 + ... + 16441.

It is an arithmetic number, because the mean of its divisors is an integer number (147780).

2⁷²²⁴⁵⁸ is an apocalyptic number.

722458 is a deficient number, since it is larger than the sum of its proper divisors (459782).

722458 is a wasteful number, since it uses less digits than its factorization.

722458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32852.

The product of its digits is 4480, while the sum is 28.

The square root of 722458 is about 849.9752937586. The cubic root of 722458 is about 89.7299725385.

Subtracting 722458 from its reverse (854227), we obtain a square (131769 = 363²).

The spelling of 722458 in words is "seven hundred twenty-two thousand, four hundred fifty-eight".