423231644 has 24 divisors (see below), whose sum is σ = 808591728. Its totient is φ = 192234240.

The previous prime is 423231637. The next prime is 423231647. The reversal of 423231644 is 446132324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423231647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75482 + ... + 80894.

It is an arithmetic number, because the mean of its divisors is an integer number (33691322).

Almost surely, 2^423231644 is an apocalyptic number.

423231644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

423231644 is a deficient number, since it is larger than the sum of its proper divisors (385360084).

423231644 is a wasteful number, since it uses less digits than its factorization.

423231644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205 (or 7203 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 423231644 is about 20572.5944887853. The cubic root of 423231644 is about 750.8030769681.

Adding to 423231644 its reverse (446132324), we get a palindrome (869363968).

The spelling of 423231644 in words is "four hundred twenty-three million, two hundred thirty-one thousand, six hundred forty-four".