428870 has 16 divisors (see below), whose sum is σ = 831600. Its totient is φ = 158304.

The previous prime is 428863. The next prime is 428873. The reversal of 428870 is 78824.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428870.

It is not an unprimeable number, because it can be changed into a prime (428873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1520 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (51975).

2⁴²⁸⁸⁷⁰ is an apocalyptic number.

428870 is a deficient number, since it is larger than the sum of its proper divisors (402730).

428870 is a wasteful number, since it uses less digits than its factorization.

428870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 428870 is about 654.8816687005. The cubic root of 428870 is about 75.4122483837.

The spelling of 428870 in words is "four hundred twenty-eight thousand, eight hundred seventy".