423331020 has 144 divisors (see below), whose sum is σ = 1544874240. Its totient is φ = 91663488.

The previous prime is 423331019. The next prime is 423331043. The reversal of 423331020 is 20133324.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 423330984 and 423331002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15099 + ... + 32781.

Almost surely, 2^423331020 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 423331020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772437120).

423331020 is an abundant number, since it is smaller than the sum of its proper divisors (1121543220).

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

423331020 is a wasteful number, since it uses less digits than its factorization.

423331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17724 (or 17719 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 423331020 is about 20575.0095990257. The cubic root of 423331020 is about 750.8618359391.

Adding to 423331020 its reverse (20133324), we get a palindrome (443464344).

It can be divided in two parts, 4233 and 31020, that added together give a palindrome (35253).

The spelling of 423331020 in words is "four hundred twenty-three million, three hundred thirty-one thousand, twenty".