426728 has 16 divisors (see below), whose sum is σ = 820260. Its totient is φ = 208000.

The previous prime is 426709. The next prime is 426731. The reversal of 426728 is 827624.

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 158404 = 518^2 + 398^2 .

Its product of digits (5376) is a multiple of the sum of its prime divisors (1344).

It is a self number, because there is not a number n which added to its sum of digits gives 426728.

It is an unprimeable number.

426728 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 3 ways as a sum of consecutive naturals, for example, 323 + ... + 978.

2⁴²⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

426728 is a deficient number, since it is larger than the sum of its proper divisors (393532).

426728 is a wasteful number, since it uses less digits than its factorization.

426728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1344 counting only the distinct ones).

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

The square root of 426728 is about 653.2442116085. The cubic root of 426728 is about 75.2864894424.

The spelling of 426728 in words is "four hundred twenty-six thousand, seven hundred twenty-eight".