120391287240 has 256 divisors, whose sum is σ = 416644300800. Its totient is φ = 27260614656.

The previous prime is 120391287221. The next prime is 120391287253. The reversal of 120391287240 is 42782193021.

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, 83662441 + ... + 83663879.

It is an arithmetic number, because the mean of its divisors is an integer number (1627516800).

Almost surely, 2^120391287240 is an apocalyptic number.

120391287240 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 120391287240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208322150400).

120391287240 is an abundant number, since it is smaller than the sum of its proper divisors (296253013560).

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

120391287240 is a wasteful number, since it uses less digits than its factorization.

120391287240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 120391287240 in words is "one hundred twenty billion, three hundred ninety-one million, two hundred eighty-seven thousand, two hundred forty".