123423320 has 32 divisors (see below), whose sum is σ = 278676720. Its totient is φ = 49196160.

The previous prime is 123423319. The next prime is 123423341. The reversal of 123423320 is 23324321.

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 = 123423292 and 123423301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6455 + ... + 16985.

Almost surely, 2^123423320 is an apocalyptic number.

123423320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123423320 is an abundant number, since it is smaller than the sum of its proper divisors (155253400).

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

123423320 is a wasteful number, since it uses less digits than its factorization.

123423320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835 (or 10831 counting only the distinct ones).

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

The square root of 123423320 is about 11109.6048534590. The cubic root of 123423320 is about 497.8888587105. Note that the first 4 decimals are identical.

Adding to 123423320 its reverse (23324321), we get a palindrome (146747641).

The spelling of 123423320 in words is "one hundred twenty-three million, four hundred twenty-three thousand, three hundred twenty".