428855 has 8 divisors (see below), whose sum is σ = 588192. Its totient is φ = 294048.

The previous prime is 428851. The next prime is 428863. The reversal of 428855 is 558824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428855 - 2² = 428851 is a prime.

It is a super-2 number, since 2×428855² = 367833222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6092 + ... + 6161.

It is an arithmetic number, because the mean of its divisors is an integer number (73524).

2⁴²⁸⁸⁵⁵ is an apocalyptic number.

428855 is a deficient number, since it is larger than the sum of its proper divisors (159337).

428855 is a wasteful number, since it uses less digits than its factorization.

428855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265.

The product of its digits is 12800, while the sum is 32.

The square root of 428855 is about 654.8702161497. The cubic root of 428855 is about 75.4113691764.

It can be divided in two parts, 428 and 855, that multiplied together give a triangular number (365940 = T₈₅₅).

The spelling of 428855 in words is "four hundred twenty-eight thousand, eight hundred fifty-five".