423456 has 48 divisors (see below), whose sum is σ = 1215648. Its totient is φ = 128000.

The previous prime is 423439. The next prime is 423457. The reversal of 423456 is 654324.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423456.

It is not an unprimeable number, because it can be changed into a prime (423457) by changing a digit.

423456 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, 856 + ... + 1256.

It is an arithmetic number, because the mean of its divisors is an integer number (25326).

2⁴²³⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607824).

423456 is an abundant number, since it is smaller than the sum of its proper divisors (792192).

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

423456 is a wasteful number, since it uses less digits than its factorization.

423456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 417 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 423456 is about 650.7349690926. The cubic root of 423456 is about 75.0935720972.

The spelling of 423456 in words is "four hundred twenty-three thousand, four hundred fifty-six".