428522 has 8 divisors (see below), whose sum is σ = 647136. Its totient is φ = 212812.

The previous prime is 428509. The next prime is 428531. The reversal of 428522 is 225824.

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

It is a super-2 number, since 2×428522² = 367262208968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (80892).

2⁴²⁸⁵²² is an apocalyptic number.

428522 is a deficient number, since it is larger than the sum of its proper divisors (218614).

428522 is a wasteful number, since it uses less digits than its factorization.

428522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its digits is 1280, while the sum is 23.

The square root of 428522 is about 654.6159179244. The cubic root of 428522 is about 75.3918454924.

The spelling of 428522 in words is "four hundred twenty-eight thousand, five hundred twenty-two".