428188 has 12 divisors (see below), whose sum is σ = 754992. Its totient is φ = 212480.

The previous prime is 428177. The next prime is 428221. The reversal of 428188 is 881824.

428188 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

428188 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 3 ways as a sum of consecutive naturals, for example, 348 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (62916).

2⁴²⁸¹⁸⁸ is an apocalyptic number.

It is an amenable number.

428188 is a deficient number, since it is larger than the sum of its proper divisors (326804).

428188 is a wasteful number, since it uses less digits than its factorization.

428188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 428188 is about 654.3607567695. The cubic root of 428188 is about 75.3722530161.

It can be divided in two parts, 428 and 188, that added together give a palindrome (616).

The spelling of 428188 in words is "four hundred twenty-eight thousand, one hundred eighty-eight".