428442 has 24 divisors (see below), whose sum is σ = 989088. Its totient is φ = 121200.

The previous prime is 428429. The next prime is 428471. The reversal of 428442 is 244824.

428442 is nontrivially palindromic in base 13.

It is a plaindrome in base 16.

It is an unprimeable number.

428442 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 11 ways as a sum of consecutive naturals, for example, 4192 + ... + 4292.

It is an arithmetic number, because the mean of its divisors is an integer number (41212).

2⁴²⁸⁴⁴² is an apocalyptic number.

428442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

428442 is an abundant number, since it is smaller than the sum of its proper divisors (560646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428442 is a wasteful number, since it uses less digits than its factorization.

428442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 113 counting only the distinct ones).

The product of its digits is 2048, while the sum is 24.

The square root of 428442 is about 654.5548105392. The cubic root of 428442 is about 75.3871536112.

The spelling of 428442 in words is "four hundred twenty-eight thousand, four hundred forty-two".