78439100382 has 32 divisors (see below), whose sum is σ = 179020173600. Its totient is φ = 25439707584.

The previous prime is 78439100321. The next prime is 78439100459. The reversal of 78439100382 is 28300193487.

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, 19627407 + ... + 19631402.

It is an arithmetic number, because the mean of its divisors is an integer number (5594380425).

Almost surely, 2^78439100382 is an apocalyptic number.

78439100382 is an abundant number, since it is smaller than the sum of its proper divisors (100581073218).

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

78439100382 is a wasteful number, since it uses less digits than its factorization.

78439100382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39258857 (or 39258851 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 78439100382 in words is "seventy-eight billion, four hundred thirty-nine million, one hundred thousand, three hundred eighty-two".