840988080 has 60 divisors (see below), whose sum is σ = 2824320720. Its totient is φ = 224263296.

The previous prime is 840988021. The next prime is 840988189. The reversal of 840988080 is 80889048.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583300 + ... + 584739.

It is an arithmetic number, because the mean of its divisors is an integer number (47072012).

Almost surely, 2^840988080 is an apocalyptic number.

840988080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840988080 is an abundant number, since it is smaller than the sum of its proper divisors (1983332640).

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

840988080 is a wasteful number, since it uses less digits than its factorization.

840988080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168058 (or 1168049 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 840988080 is about 28999.7944820304. The cubic root of 840988080 is about 943.9086081685.

The spelling of 840988080 in words is "eight hundred forty million, nine hundred eighty-eight thousand, eighty".