840231984 has 80 divisors (see below), whose sum is σ = 2293047680. Its totient is φ = 264384000.

The previous prime is 840231979. The next prime is 840232031. The reversal of 840231984 is 489132048.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278484 + ... + 281484.

It is an arithmetic number, because the mean of its divisors is an integer number (28663096).

Almost surely, 2^840231984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840231984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146523840).

840231984 is an abundant number, since it is smaller than the sum of its proper divisors (1452815696).

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

840231984 is a wasteful number, since it uses less digits than its factorization.

840231984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 840231984 is about 28986.7553203183. The cubic root of 840231984 is about 943.6256475542.

The spelling of 840231984 in words is "eight hundred forty million, two hundred thirty-one thousand, nine hundred eighty-four".