623643432 has 32 divisors (see below), whose sum is σ = 1560058080. Its totient is φ = 207754560.

The previous prime is 623643359. The next prime is 623643529. The reversal of 623643432 is 234346326.

It is a happy number.

It is a super-2 number, since 2×623643432² = 777862260553477248, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 623643393 and 623643402.

It is an unprimeable number.

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, 37683 + ... + 51645.

It is an arithmetic number, because the mean of its divisors is an integer number (48751815).

Almost surely, 2^623643432 is an apocalyptic number.

It is an amenable number.

623643432 is an abundant number, since it is smaller than the sum of its proper divisors (936414648).

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

623643432 is a wasteful number, since it uses less digits than its factorization.

623643432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15833 (or 15829 counting only the distinct ones).

The product of its digits is 62208, while the sum is 33.

The square root of 623643432 is about 24972.8539017870. The cubic root of 623643432 is about 854.3689389422.

Adding to 623643432 its reverse (234346326), we get a palindrome (857989758).

The spelling of 623643432 in words is "six hundred twenty-three million, six hundred forty-three thousand, four hundred thirty-two".