123210320 has 80 divisors (see below), whose sum is σ = 294647808. Its totient is φ = 47900160.

The previous prime is 123210317. The next prime is 123210343. The reversal of 123210320 is 23012321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 123210295 and 123210304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680630 + ... + 680810.

Almost surely, 2^123210320 is an apocalyptic number.

123210320 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 123210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147323904).

123210320 is an abundant number, since it is smaller than the sum of its proper divisors (171437488).

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

123210320 is a wasteful number, since it uses less digits than its factorization.

123210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123210320 is about 11100.0144144051. The cubic root of 123210320 is about 497.6022802596.

Adding to 123210320 its reverse (23012321), we get a palindrome (146222641).

The spelling of 123210320 in words is "one hundred twenty-three million, two hundred ten thousand, three hundred twenty".