722418 has 16 divisors (see below), whose sum is σ = 1521120. Its totient is φ = 228096.

The previous prime is 722417. The next prime is 722431. The reversal of 722418 is 814227.

722418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (722411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3055 + ... + 3282.

It is an arithmetic number, because the mean of its divisors is an integer number (95070).

2⁷²²⁴¹⁸ is an apocalyptic number.

722418 is an abundant number, since it is smaller than the sum of its proper divisors (798702).

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

722418 is a wasteful number, since it uses less digits than its factorization.

722418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361.

The product of its digits is 896, while the sum is 24.

The square root of 722418 is about 849.9517633372. The cubic root of 722418 is about 89.7283164952.

Subtracting 722418 from its reverse (814227), we obtain a square (91809 = 303²).

The spelling of 722418 in words is "seven hundred twenty-two thousand, four hundred eighteen".