123020320 has 48 divisors (see below), whose sum is σ = 300668760. Its totient is φ = 47509504.

The previous prime is 123020311. The next prime is 123020327. The reversal of 123020320 is 23020321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80353296 + 42667024 = 8964^2 + 6532^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123020320.

It is not an unprimeable number, because it can be changed into a prime (123020327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8617 + ... + 17896.

Almost surely, 2^123020320 is an apocalyptic number.

123020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123020320 is an abundant number, since it is smaller than the sum of its proper divisors (177648440).

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

123020320 is a wasteful number, since it uses less digits than its factorization.

123020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26557 (or 26549 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 123020320 is about 11091.4525649258. The cubic root of 123020320 is about 497.3463680567.

Adding to 123020320 its reverse (23020321), we get a palindrome (146040641).

Subtracting from 123020320 its reverse (23020321), we obtain a palindrome (99999999).

The spelling of 123020320 in words is "one hundred twenty-three million, twenty thousand, three hundred twenty".