840004080 has 40 divisors (see below), whose sum is σ = 2604013392. Its totient is φ = 224001024.

The previous prime is 840004043. The next prime is 840004093. The reversal of 840004080 is 80400048.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 840004080.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749769 + ... + 1750248.

Almost surely, 2^840004080 is an apocalyptic number.

840004080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840004080 is an abundant number, since it is smaller than the sum of its proper divisors (1764009312).

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

840004080 is a wasteful number, since it uses less digits than its factorization.

840004080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500033 (or 3500027 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 840004080 is about 28982.8238789805. The cubic root of 840004080 is about 943.5403236951.

The spelling of 840004080 in words is "eight hundred forty million, four thousand, eighty".