123009320 has 128 divisors (see below), whose sum is σ = 329011200. Its totient is φ = 40525056.

The previous prime is 123009269. The next prime is 123009323. The reversal of 123009320 is 23900321.

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 = 123009292 and 123009301.

It is not an unprimeable number, because it can be changed into a prime (123009323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1481999 + ... + 1482081.

It is an arithmetic number, because the mean of its divisors is an integer number (2570400).

Almost surely, 2^123009320 is an apocalyptic number.

123009320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123009320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164505600).

123009320 is an abundant number, since it is smaller than the sum of its proper divisors (206001880).

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

123009320 is a wasteful number, since it uses less digits than its factorization.

123009320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 123009320 is about 11090.9566765000. The cubic root of 123009320 is about 497.3315440202.

Adding to 123009320 its reverse (23900321), we get a palindrome (146909641).

The spelling of 123009320 in words is "one hundred twenty-three million, nine thousand, three hundred twenty".