423115440 has 160 divisors (see below), whose sum is σ = 1438407936. Its totient is φ = 102036480.

The previous prime is 423115421. The next prime is 423115447. The reversal of 423115440 is 44511324.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 423115440.

It is not an unprimeable number, because it can be changed into a prime (423115447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773247 + ... + 773793.

Almost surely, 2^423115440 is an apocalyptic number.

423115440 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 423115440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719203968).

423115440 is an abundant number, since it is smaller than the sum of its proper divisors (1015292496).

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

423115440 is a wasteful number, since it uses less digits than its factorization.

423115440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 423115440 is about 20569.7700521907. The cubic root of 423115440 is about 750.7343562820.

Adding to 423115440 its reverse (44511324), we get a palindrome (467626764).

The spelling of 423115440 in words is "four hundred twenty-three million, one hundred fifteen thousand, four hundred forty".