123195240 has 384 divisors, whose sum is σ = 503193600. Its totient is φ = 25505280.

The previous prime is 123195229. The next prime is 123195307. The reversal of 123195240 is 42591321.

123195240 is a `hidden beast` number, since 123 + 19 + 524 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1484239 + ... + 1484321.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^123195240 is an apocalyptic number.

123195240 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 123195240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251596800).

123195240 is an abundant number, since it is smaller than the sum of its proper divisors (379998360).

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

123195240 is a wasteful number, since it uses less digits than its factorization.

123195240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 123195240 is about 11099.3351152220. The cubic root of 123195240 is about 497.5819785280.

The spelling of 123195240 in words is "one hundred twenty-three million, one hundred ninety-five thousand, two hundred forty".