123873220 has 24 divisors (see below), whose sum is σ = 275436504. Its totient is φ = 46634496.

The previous prime is 123873187. The next prime is 123873221. The reversal of 123873220 is 22378321.

It can be written as a sum of positive squares in 4 ways, for example, as 5846724 + 118026496 = 2418^2 + 10864^2 .

It is not an unprimeable number, because it can be changed into a prime (123873221) by changing a digit.

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, 181827 + ... + 182506.

It is an arithmetic number, because the mean of its divisors is an integer number (11476521).

Almost surely, 2^123873220 is an apocalyptic number.

123873220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123873220 is an abundant number, since it is smaller than the sum of its proper divisors (151563284).

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

123873220 is a wasteful number, since it uses less digits than its factorization.

123873220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364359 (or 364357 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 123873220 is about 11129.8346798144. The cubic root of 123873220 is about 498.4930896717.

The spelling of 123873220 in words is "one hundred twenty-three million, eight hundred seventy-three thousand, two hundred twenty".