428830 has 32 divisors (see below), whose sum is σ = 848160. Its totient is φ = 155520.

The previous prime is 428809. The next prime is 428833. The reversal of 428830 is 38824.

428830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 428795 and 428804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428833) by changing a digit.

428830 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 15 ways as a sum of consecutive naturals, for example, 7000 + ... + 7060.

It is an arithmetic number, because the mean of its divisors is an integer number (26505).

2⁴²⁸⁸³⁰ is an apocalyptic number.

428830 is a deficient number, since it is larger than the sum of its proper divisors (419330).

428830 is a wasteful number, since it uses less digits than its factorization.

428830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 428830 is about 654.8511281200. The cubic root of 428830 is about 75.4099037853.

The spelling of 428830 in words is "four hundred twenty-eight thousand, eight hundred thirty".