123520740 has 192 divisors, whose sum is σ = 418037760. Its totient is φ = 26657280.

The previous prime is 123520717. The next prime is 123520751. The reversal of 123520740 is 47025321.

It is a self number, because there is not a number n which added to its sum of digits gives 123520740.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 689971 + ... + 690149.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^123520740 is an apocalyptic number.

123520740 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 123520740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209018880).

123520740 is an abundant number, since it is smaller than the sum of its proper divisors (294517020).

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

123520740 is a wasteful number, since it uses less digits than its factorization.

123520740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 123520740 is about 11113.9884829885. The cubic root of 123520740 is about 498.0198214720.

The spelling of 123520740 in words is "one hundred twenty-three million, five hundred twenty thousand, seven hundred forty".