423320544 has 72 divisors (see below), whose sum is σ = 1205836632. Its totient is φ = 140870400.

The previous prime is 423320537. The next prime is 423320549. The reversal of 423320544 is 445023324.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423320549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291019 + ... + 292469.

It is an arithmetic number, because the mean of its divisors is an integer number (16747731).

Almost surely, 2^423320544 is an apocalyptic number.

It is an amenable number.

423320544 is an abundant number, since it is smaller than the sum of its proper divisors (782516088).

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

423320544 is a wasteful number, since it uses less digits than its factorization.

423320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 423320544 is about 20574.7550167675. The cubic root of 423320544 is about 750.8556421308.

Adding to 423320544 its reverse (445023324), we get a palindrome (868343868).

The spelling of 423320544 in words is "four hundred twenty-three million, three hundred twenty thousand, five hundred forty-four".