423240444 has 48 divisors (see below), whose sum is σ = 1197047040. Its totient is φ = 128254320.

The previous prime is 423240439. The next prime is 423240473. The reversal of 423240444 is 444042324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176944 + ... + 179319.

It is an arithmetic number, because the mean of its divisors is an integer number (24938480).

Almost surely, 2^423240444 is an apocalyptic number.

423240444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

423240444 is an abundant number, since it is smaller than the sum of its proper divisors (773806596).

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

423240444 is a wasteful number, since it uses less digits than its factorization.

423240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356287 (or 356279 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 423240444 is about 20572.8083644407. The cubic root of 423240444 is about 750.8082805970.

Adding to 423240444 its reverse (444042324), we get a palindrome (867282768).

The spelling of 423240444 in words is "four hundred twenty-three million, two hundred forty thousand, four hundred forty-four".