423800564 has 18 divisors (see below), whose sum is σ = 815204082. Its totient is φ = 192636400.

The previous prime is 423800563. The next prime is 423800569. The reversal of 423800564 is 465008324.

It can be written as a sum of positive squares in only one way, i.e., 383376400 + 40424164 = 19580^2 + 6358^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 423800564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423800563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 437327 + ... + 438294.

Almost surely, 2^423800564 is an apocalyptic number.

423800564 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

423800564 is a deficient number, since it is larger than the sum of its proper divisors (391403518).

423800564 is a wasteful number, since it uses less digits than its factorization.

423800564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875647 (or 875634 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 423800564 is about 20586.4169781922. The cubic root of 423800564 is about 751.1393432824.

Adding to 423800564 its reverse (465008324), we get a palindrome (888808888).

The spelling of 423800564 in words is "four hundred twenty-three million, eight hundred thousand, five hundred sixty-four".