423500220 has 144 divisors (see below), whose sum is σ = 1509292512. Its totient is φ = 94763520.

The previous prime is 423500213. The next prime is 423500237. The reversal of 423500220 is 22005324.

It is a super-4 number, since 4×423500220⁴ (a number of 36 digits) contains 4444 as substring.

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 = 423500193 and 423500202.

It is a congruent number.

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, 17514 + ... + 33966.

It is an arithmetic number, because the mean of its divisors is an integer number (10481198).

Almost surely, 2^423500220 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 423500220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754646256).

423500220 is an abundant number, since it is smaller than the sum of its proper divisors (1085792292).

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

423500220 is a wasteful number, since it uses less digits than its factorization.

423500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16492 (or 16487 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 423500220 is about 20579.1209724808. The cubic root of 423500220 is about 750.9618592417.

Adding to 423500220 its reverse (22005324), we get a palindrome (445505544).

The spelling of 423500220 in words is "four hundred twenty-three million, five hundred thousand, two hundred twenty".