83904405728 has 48 divisors (see below), whose sum is σ = 194065620336. Its totient is φ = 35204643840.

The previous prime is 83904405727. The next prime is 83904405731. The reversal of 83904405728 is 82750440938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83904405727) 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, 9163301 + ... + 9172452.

It is an arithmetic number, because the mean of its divisors is an integer number (4043033757).

Almost surely, 2^83904405728 is an apocalyptic number.

83904405728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

83904405728 is an abundant number, since it is smaller than the sum of its proper divisors (110161214608).

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

83904405728 is a wasteful number, since it uses less digits than its factorization.

83904405728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18335787 (or 18335779 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 83904405728 in words is "eighty-three billion, nine hundred four million, four hundred five thousand, seven hundred twenty-eight".