123323420 has 24 divisors (see below), whose sum is σ = 282523248. Its totient is φ = 44844800.

The previous prime is 123323419. The next prime is 123323443. The reversal of 123323420 is 24323321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123323392 and 123323401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280061 + ... + 280500.

It is an arithmetic number, because the mean of its divisors is an integer number (11771802).

Almost surely, 2^123323420 is an apocalyptic number.

123323420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123323420 is an abundant number, since it is smaller than the sum of its proper divisors (159199828).

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

123323420 is a wasteful number, since it uses less digits than its factorization.

123323420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560581 (or 560579 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 123323420 is about 11105.1078337853. The cubic root of 123323420 is about 497.7544904707.

Adding to 123323420 its reverse (24323321), we get a palindrome (147646741).

Subtracting from 123323420 its reverse (24323321), we obtain a palindrome (99000099).

The spelling of 123323420 in words is "one hundred twenty-three million, three hundred twenty-three thousand, four hundred twenty".