423128475 has 144 divisors (see below), whose sum is σ = 987258240. Its totient is φ = 175694400.

The previous prime is 423128449. The next prime is 423128479. The reversal of 423128475 is 574821324.

It is a happy number.

It is not a de Polignac number, because 423128475 - 2⁸ = 423128219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423128479) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 363244 + ... + 364406.

It is an arithmetic number, because the mean of its divisors is an integer number (6855960).

Almost surely, 2^423128475 is an apocalyptic number.

423128475 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

423128475 is an abundant number, since it is smaller than the sum of its proper divisors (564129765).

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

423128475 is a wasteful number, since it uses less digits than its factorization.

423128475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1189 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 423128475 is about 20570.0868982122. The cubic root of 423128475 is about 750.7420655428.

Adding to 423128475 its reverse (574821324), we get a palindrome (997949799).

The spelling of 423128475 in words is "four hundred twenty-three million, one hundred twenty-eight thousand, four hundred seventy-five".