423003240 has 192 divisors, whose sum is σ = 1540805760. Its totient is φ = 99740160.

The previous prime is 423003233. The next prime is 423003241. The reversal of 423003240 is 42300324.

423003240 is a `hidden beast` number, since 42 + 300 + 324 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (423003241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145077 + ... + 147963.

It is an arithmetic number, because the mean of its divisors is an integer number (8025030).

Almost surely, 2^423003240 is an apocalyptic number.

423003240 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 423003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770402880).

423003240 is an abundant number, since it is smaller than the sum of its proper divisors (1117802520).

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

423003240 is a wasteful number, since it uses less digits than its factorization.

423003240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2945 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 423003240 is about 20567.0425681477. The cubic root of 423003240 is about 750.6679915398.

Adding to 423003240 its reverse (42300324), we get a palindrome (465303564).

The spelling of 423003240 in words is "four hundred twenty-three million, three thousand, two hundred forty".