423628 has 6 divisors (see below), whose sum is σ = 741356. Its totient is φ = 211812.

The previous prime is 423617. The next prime is 423649. The reversal of 423628 is 826324.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

423628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52950 + ... + 52957.

2⁴²³⁶²⁸ is an apocalyptic number.

It is an amenable number.

423628 is a deficient number, since it is larger than the sum of its proper divisors (317728).

423628 is a wasteful number, since it uses less digits than its factorization.

423628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105911 (or 105909 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 423628 is about 650.8671139334. The cubic root of 423628 is about 75.1037379279.

It can be divided in two parts, 4 and 23628, that added together give a palindrome (23632).

The spelling of 423628 in words is "four hundred twenty-three thousand, six hundred twenty-eight".