423442140 has 48 divisors (see below), whose sum is σ = 1293425280. Its totient is φ = 102652480.

The previous prime is 423442127. The next prime is 423442141. The reversal of 423442140 is 41244324.

It is a happy number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 423442140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423442141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320130 + ... + 321449.

It is an arithmetic number, because the mean of its divisors is an integer number (26946360).

Almost surely, 2^423442140 is an apocalyptic number.

It is an amenable number.

423442140 is an abundant number, since it is smaller than the sum of its proper divisors (869983140).

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

423442140 is a wasteful number, since it uses less digits than its factorization.

423442140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641602 (or 641600 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 423442140 is about 20577.7097851049. The cubic root of 423442140 is about 750.9275280051.

Adding to 423442140 its reverse (41244324), we get a palindrome (464686464).

The spelling of 423442140 in words is "four hundred twenty-three million, four hundred forty-two thousand, one hundred forty".