840986880 has 144 divisors (see below), whose sum is σ = 2697589440. Its totient is φ = 223289344.

The previous prime is 840986851. The next prime is 840986891. The reversal of 840986880 is 88689048.

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, 1493479 + ... + 1494041.

It is an arithmetic number, because the mean of its divisors is an integer number (18733260).

Almost surely, 2^840986880 is an apocalyptic number.

840986880 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 840986880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348794720).

840986880 is an abundant number, since it is smaller than the sum of its proper divisors (1856602560).

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

840986880 is a wasteful number, since it uses less digits than its factorization.

840986880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The square root of 840986880 is about 28999.7737922212. The cubic root of 840986880 is about 943.9081592161.

The spelling of 840986880 in words is "eight hundred forty million, nine hundred eighty-six thousand, eight hundred eighty".