423230440 has 32 divisors (see below), whose sum is σ = 970240680. Its totient is φ = 166097152.

The previous prime is 423230417. The next prime is 423230443. The reversal of 423230440 is 44032324.

It can be written as a sum of positive squares in 4 ways, for example, as 290566116 + 132664324 = 17046^2 + 11518^2 .

It is not an unprimeable number, because it can be changed into a prime (423230443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97699 + ... + 101938.

Almost surely, 2^423230440 is an apocalyptic number.

423230440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423230440 is an abundant number, since it is smaller than the sum of its proper divisors (547010240).

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

423230440 is a wasteful number, since it uses less digits than its factorization.

423230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199701 (or 199697 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 423230440 is about 20572.5652265341. The cubic root of 423230440 is about 750.8023650114.

Adding to 423230440 its reverse (44032324), we get a palindrome (467262764).

The spelling of 423230440 in words is "four hundred twenty-three million, two hundred thirty thousand, four hundred forty".