428530 has 8 divisors (see below), whose sum is σ = 771372. Its totient is φ = 171408.

The previous prime is 428509. The next prime is 428531. The reversal of 428530 is 35824.

It can be written as a sum of positive squares in 2 ways, for example, as 388129 + 40401 = 623^2 + 201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (428531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21417 + ... + 21436.

2⁴²⁸⁵³⁰ is an apocalyptic number.

428530 is a deficient number, since it is larger than the sum of its proper divisors (342842).

428530 is a wasteful number, since it uses less digits than its factorization.

428530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42860.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 428530 is about 654.6220283492. The cubic root of 428530 is about 75.3923146484.

The spelling of 428530 in words is "four hundred twenty-eight thousand, five hundred thirty".