423140144 has 40 divisors (see below), whose sum is σ = 937939968. Its totient is φ = 181154880.

The previous prime is 423140143. The next prime is 423140147. The reversal of 423140144 is 441041324.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (423140143) 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 7 ways as a sum of consecutive naturals, for example, 174299 + ... + 176709.

Almost surely, 2^423140144 is an apocalyptic number.

It is an amenable number.

423140144 is an abundant number, since it is smaller than the sum of its proper divisors (514799824).

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

423140144 is a wasteful number, since it uses less digits than its factorization.

423140144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3987 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 423140144 is about 20570.3705362835. The cubic root of 423140144 is about 750.7489667790.

Adding to 423140144 its reverse (441041324), we get a palindrome (864181468).

The spelling of 423140144 in words is "four hundred twenty-three million, one hundred forty thousand, one hundred forty-four".