423220424 has 64 divisors (see below), whose sum is σ = 908513280. Its totient is φ = 182952000.

The previous prime is 423220411. The next prime is 423220451. The reversal of 423220424 is 424022324.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 423220424.

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, 426569 + ... + 427559.

It is an arithmetic number, because the mean of its divisors is an integer number (14195520).

Almost surely, 2^423220424 is an apocalyptic number.

423220424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423220424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454256640).

423220424 is an abundant number, since it is smaller than the sum of its proper divisors (485292856).

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

423220424 is a wasteful number, since it uses less digits than its factorization.

423220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 423220424 is about 20572.3217941000. The cubic root of 423220424 is about 750.7964422366.

Adding to 423220424 its reverse (424022324), we get a palindrome (847242748).

The spelling of 423220424 in words is "four hundred twenty-three million, two hundred twenty thousand, four hundred twenty-four".