428726 has 4 divisors (see below), whose sum is σ = 643092. Its totient is φ = 214362.

The previous prime is 428693. The next prime is 428731. The reversal of 428726 is 627824.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

428726 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 as a sum of consecutive naturals, namely, 107180 + ... + 107183.

It is an arithmetic number, because the mean of its divisors is an integer number (160773).

2⁴²⁸⁷²⁶ is an apocalyptic number.

428726 is a deficient number, since it is larger than the sum of its proper divisors (214366).

428726 is a wasteful number, since it uses less digits than its factorization.

428726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214365.

The product of its digits is 5376, while the sum is 29.

The square root of 428726 is about 654.7717159438. The cubic root of 428726 is about 75.4038071471.

The spelling of 428726 in words is "four hundred twenty-eight thousand, seven hundred twenty-six".