840581120 has 120 divisors (see below), whose sum is σ = 2088699648. Its totient is φ = 324403200.

The previous prime is 840581117. The next prime is 840581143. The reversal of 840581120 is 21185048.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2539355 + ... + 2539685.

Almost surely, 2^840581120 is an apocalyptic number.

840581120 is a gapful number since it is divisible by the number (80) 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 840581120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044349824).

840581120 is an abundant number, since it is smaller than the sum of its proper divisors (1248118528).

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

840581120 is an equidigital number, since it uses as much as digits as its factorization.

840581120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 840581120 is about 28992.7770315298. Note that the first 3 decimals coincide. The cubic root of 840581120 is about 943.7563289490.

The spelling of 840581120 in words is "eight hundred forty million, five hundred eighty-one thousand, one hundred twenty".