428827 has 4 divisors (see below), whose sum is σ = 490096. Its totient is φ = 367560.

The previous prime is 428809. The next prime is 428833. The reversal of 428827 is 728824.

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

It is a cyclic number.

It is not a de Polignac number, because 428827 - 2¹¹ = 426779 is a prime.

It is a super-3 number, since 3×428827³ = 236574330703335849, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428807) 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, 30624 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (122524).

2⁴²⁸⁸²⁷ is an apocalyptic number.

428827 is a deficient number, since it is larger than the sum of its proper divisors (61269).

428827 is an equidigital number, since it uses as much as digits as its factorization.

428827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61268.

The product of its digits is 7168, while the sum is 31.

The square root of 428827 is about 654.8488375190. The cubic root of 428827 is about 75.4097279346.

The spelling of 428827 in words is "four hundred twenty-eight thousand, eight hundred twenty-seven".