84240400139 has 32 divisors (see below), whose sum is σ = 104245346304. Its totient is φ = 66509926560.

The previous prime is 84240400129. The next prime is 84240400159. The reversal of 84240400139 is 93100404248.

It is not a de Polignac number, because 84240400139 - 2¹⁶ = 84240334603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84240400099 and 84240400108.

It is not an unprimeable number, because it can be changed into a prime (84240400109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405842 + ... + 577224.

It is an arithmetic number, because the mean of its divisors is an integer number (3257667072).

Almost surely, 2^84240400139 is an apocalyptic number.

84240400139 is a deficient number, since it is larger than the sum of its proper divisors (20004946165).

84240400139 is a wasteful number, since it uses less digits than its factorization.

84240400139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171527.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 84240400139 in words is "eighty-four billion, two hundred forty million, four hundred thousand, one hundred thirty-nine".