423305040 has 80 divisors (see below), whose sum is σ = 1321790400. Its totient is φ = 112060416.

The previous prime is 423305023. The next prime is 423305101. The reversal of 423305040 is 40503324.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 423304998 and 423305016.

It is a congruent number.

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, 27016 + ... + 39704.

It is an arithmetic number, because the mean of its divisors is an integer number (16522380).

Almost surely, 2^423305040 is an apocalyptic number.

423305040 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 423305040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660895200).

423305040 is an abundant number, since it is smaller than the sum of its proper divisors (898485360).

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

423305040 is a wasteful number, since it uses less digits than its factorization.

423305040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12844 (or 12838 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 423305040 is about 20574.3782409092. The cubic root of 423305040 is about 750.8464753909.

Adding to 423305040 its reverse (40503324), we get a palindrome (463808364).

The spelling of 423305040 in words is "four hundred twenty-three million, three hundred five thousand, forty".