84840020688 has 80 divisors (see below), whose sum is σ = 222254078400. Its totient is φ = 27884848128.

The previous prime is 84840020653. The next prime is 84840020743. The reversal of 84840020688 is 88602004848.

It is a super-2 number, since 2×84840020688² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 936531 + ... + 1023117.

It is an arithmetic number, because the mean of its divisors is an integer number (2778175980).

Almost surely, 2^84840020688 is an apocalyptic number.

It is an amenable number.

84840020688 is an abundant number, since it is smaller than the sum of its proper divisors (137414057712).

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

84840020688 is a wasteful number, since it uses less digits than its factorization.

84840020688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86884 (or 86878 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 48.

The spelling of 84840020688 in words is "eighty-four billion, eight hundred forty million, twenty thousand, six hundred eighty-eight".