123520388 has 6 divisors (see below), whose sum is σ = 216160686. Its totient is φ = 61760192.

The previous prime is 123520357. The next prime is 123520391. The reversal of 123520388 is 883025321.

It can be written as a sum of positive squares in only one way, i.e., 114746944 + 8773444 = 10712^2 + 2962^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15440045 + ... + 15440052.

It is an arithmetic number, because the mean of its divisors is an integer number (36026781).

Almost surely, 2^123520388 is an apocalyptic number.

It is an amenable number.

123520388 is a deficient number, since it is larger than the sum of its proper divisors (92640298).

123520388 is a wasteful number, since it uses less digits than its factorization.

123520388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30880101 (or 30880099 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 123520388 is about 11113.9726470781. The cubic root of 123520388 is about 498.0193483985.

The spelling of 123520388 in words is "one hundred twenty-three million, five hundred twenty thousand, three hundred eighty-eight".