423543040 has 72 divisors (see below), whose sum is σ = 1019469528. Its totient is φ = 168591360.

The previous prime is 423543019. The next prime is 423543089. The reversal of 423543040 is 40345324.

It can be written as a sum of positive squares in 4 ways, for example, as 214798336 + 208744704 = 14656^2 + 14448^2 .

It is a junction number, because it is equal to n+sod(n) for n = 423542996 and 423543014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307794 + ... + 309166.

It is an arithmetic number, because the mean of its divisors is an integer number (14159299).

Almost surely, 2^423543040 is an apocalyptic number.

423543040 is a gapful number since it is divisible by the number (40) 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 423543040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509734764).

423543040 is an abundant number, since it is smaller than the sum of its proper divisors (595926488).

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

423543040 is a wasteful number, since it uses less digits than its factorization.

423543040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 423543040 is about 20580.1613210392. The cubic root of 423543040 is about 750.9871682432.

Adding to 423543040 its reverse (40345324), we get a palindrome (463888364).

The spelling of 423543040 in words is "four hundred twenty-three million, five hundred forty-three thousand, forty".