423542420 has 96 divisors (see below), whose sum is σ = 1082108160. Its totient is φ = 135936000.

The previous prime is 423542417. The next prime is 423542473. The reversal of 423542420 is 24245324.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 423542420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 597026 + ... + 597734.

It is an arithmetic number, because the mean of its divisors is an integer number (11271960).

Almost surely, 2^423542420 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 423542420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541054080).

423542420 is an abundant number, since it is smaller than the sum of its proper divisors (658565740).

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

423542420 is a wasteful number, since it uses less digits than its factorization.

423542420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 423542420 is about 20580.1462579837. The cubic root of 423542420 is about 750.9868018009.

Adding to 423542420 its reverse (24245324), we get a palindrome (447787744).

The spelling of 423542420 in words is "four hundred twenty-three million, five hundred forty-two thousand, four hundred twenty".