423870 has 32 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 110880.

The previous prime is 423869. The next prime is 423883. The reversal of 423870 is 78324.

It is a Curzon number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 423870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2031 + ... + 2229.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2⁴²³⁸⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518400).

423870 is an abundant number, since it is smaller than the sum of its proper divisors (612930).

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

423870 is a wasteful number, since it uses less digits than its factorization.

423870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 423870 is about 651.0529932348. The cubic root of 423870 is about 75.1180363570.

The spelling of 423870 in words is "four hundred twenty-three thousand, eight hundred seventy".