83688338840 has 32 divisors (see below), whose sum is σ = 188478360000. Its totient is φ = 33443407104.

The previous prime is 83688338831. The next prime is 83688338849. The reversal of 83688338840 is 4883388638.

It is an interprime number because it is at equal distance from previous prime (83688338831) and next prime (83688338849).

It is a self number, because there is not a number n which added to its sum of digits gives 83688338840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83688338849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955280 + ... + 1039199.

It is an arithmetic number, because the mean of its divisors is an integer number (5889948750).

Almost surely, 2^83688338840 is an apocalyptic number.

It is an amenable number.

83688338840 is an abundant number, since it is smaller than the sum of its proper divisors (104790021160).

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

83688338840 is a wasteful number, since it uses less digits than its factorization.

83688338840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995539 (or 1995535 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 59.

The spelling of 83688338840 in words is "eighty-three billion, six hundred eighty-eight million, three hundred thirty-eight thousand, eight hundred forty".