428625 has 32 divisors (see below), whose sum is σ = 798720. Its totient is φ = 226800.

The previous prime is 428579. The next prime is 428629. The reversal of 428625 is 526824.

It is not a de Polignac number, because 428625 - 2⁸ = 428369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428625.

It is not an unprimeable number, because it can be changed into a prime (428629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3312 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (24960).

2⁴²⁸⁶²⁵ is an apocalyptic number.

428625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428625 is a deficient number, since it is larger than the sum of its proper divisors (370095).

428625 is a wasteful number, since it uses less digits than its factorization.

428625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 135 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 428625 is about 654.6945852839. The cubic root of 428625 is about 75.3978854297.

The spelling of 428625 in words is "four hundred twenty-eight thousand, six hundred twenty-five".