84438640127028 has 48 divisors (see below), whose sum is σ = 214936205125824. Its totient is φ = 25587289943040.

The previous prime is 84438640126987. The next prime is 84438640127077. The reversal of 84438640127028 is 82072104683448.

It is a super-2 number, since 2×84438640127028² (a number of 29 digits) contains 22 as substring.

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, 17643876 + ... + 21913092.

It is an arithmetic number, because the mean of its divisors is an integer number (4477837606788).

Almost surely, 2^{84438640127028} is an apocalyptic number.

It is an amenable number.

84438640127028 is an abundant number, since it is smaller than the sum of its proper divisors (130497564998796).

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

84438640127028 is a wasteful number, since it uses less digits than its factorization.

84438640127028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419072 (or 4419070 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 57.

The spelling of 84438640127028 in words is "eighty-four trillion, four hundred thirty-eight billion, six hundred forty million, one hundred twenty-seven thousand, twenty-eight".