428722 has 16 divisors (see below), whose sum is σ = 744192. Its totient is φ = 181440.

The previous prime is 428693. The next prime is 428731. The reversal of 428722 is 227824.

428722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

428722 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, 1447 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (46512).

2⁴²⁸⁷²² is an apocalyptic number.

428722 is a deficient number, since it is larger than the sum of its proper divisors (315470).

428722 is a wasteful number, since it uses less digits than its factorization.

428722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its digits is 1792, while the sum is 25.

The square root of 428722 is about 654.7686614370. The cubic root of 428722 is about 75.4035726413.

The spelling of 428722 in words is "four hundred twenty-eight thousand, seven hundred twenty-two".