423684 has 24 divisors (see below), whose sum is σ = 1098720. Its totient is φ = 141192.

The previous prime is 423667. The next prime is 423697. The reversal of 423684 is 486324.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423684.

It is an unprimeable number.

423684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (45780).

2⁴²³⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

423684 is an abundant number, since it is smaller than the sum of its proper divisors (675036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423684 is a wasteful number, since it uses less digits than its factorization.

423684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936 (or 3928 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 423684 is about 650.9101320459. The cubic root of 423684 is about 75.1070471394.

The spelling of 423684 in words is "four hundred twenty-three thousand, six hundred eighty-four".