428263 has 4 divisors (see below), whose sum is σ = 467208. Its totient is φ = 389320.

The previous prime is 428251. The next prime is 428273. The reversal of 428263 is 362824.

It is a happy number.

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 428263 - 2⁵ = 428231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428273) 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, 19456 + ... + 19477.

It is an arithmetic number, because the mean of its divisors is an integer number (116802).

2⁴²⁸²⁶³ is an apocalyptic number.

428263 is a deficient number, since it is larger than the sum of its proper divisors (38945).

428263 is a wasteful number, since it uses less digits than its factorization.

428263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38944.

The product of its digits is 2304, while the sum is 25.

The square root of 428263 is about 654.4180620979. The cubic root of 428263 is about 75.3766534111.

The spelling of 428263 in words is "four hundred twenty-eight thousand, two hundred sixty-three".