840404004080 has 20 divisors (see below), whose sum is σ = 1953939309672. Its totient is φ = 336161601600.

The previous prime is 840404004019. The next prime is 840404004131. The reversal of 840404004080 is 80400404048.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5252524946 + ... + 5252525105.

Almost surely, 2^840404004080 is an apocalyptic number.

840404004080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840404004080 is an abundant number, since it is smaller than the sum of its proper divisors (1113535305592).

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

840404004080 is a wasteful number, since it uses less digits than its factorization.

840404004080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505050064 (or 10505050058 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 840404004080 in words is "eight hundred forty billion, four hundred four million, four thousand, eighty".