78065984 has 56 divisors (see below), whose sum is σ = 166969440. Its totient is φ = 36094464.

The previous prime is 78065969. The next prime is 78065993. The reversal of 78065984 is 48956087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51542 + ... + 53034.

Almost surely, 2^78065984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78065984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83484720).

78065984 is an abundant number, since it is smaller than the sum of its proper divisors (88903456).

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

78065984 is a wasteful number, since it uses less digits than its factorization.

78065984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 78065984 is about 8835.4956850196. The cubic root of 78065984 is about 427.3863158831.

The spelling of 78065984 in words is "seventy-eight million, sixty-five thousand, nine hundred eighty-four".