428755 has 4 divisors (see below), whose sum is σ = 514512. Its totient is φ = 343000.

The previous prime is 428741. The next prime is 428759. The reversal of 428755 is 557824.

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

It is not a de Polignac number, because 428755 - 2¹¹ = 426707 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428759) 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, 42871 + ... + 42880.

It is an arithmetic number, because the mean of its divisors is an integer number (128628).

2⁴²⁸⁷⁵⁵ is an apocalyptic number.

428755 is a deficient number, since it is larger than the sum of its proper divisors (85757).

428755 is an equidigital number, since it uses as much as digits as its factorization.

428755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85756.

The product of its digits is 11200, while the sum is 31.

The square root of 428755 is about 654.7938606921. The cubic root of 428755 is about 75.4055072703.

The spelling of 428755 in words is "four hundred twenty-eight thousand, seven hundred fifty-five".