78446984 has 64 divisors (see below), whose sum is σ = 184412160. Its totient is φ = 30392640.

The previous prime is 78446983. The next prime is 78446989. The reversal of 78446984 is 48964487.

It is not an unprimeable number, because it can be changed into a prime (78446983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213569 + ... + 213935.

It is an arithmetic number, because the mean of its divisors is an integer number (2881440).

Almost surely, 2^78446984 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 78446984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92206080).

78446984 is an abundant number, since it is smaller than the sum of its proper divisors (105965176).

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

78446984 is a wasteful number, since it uses less digits than its factorization.

78446984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 734 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 78446984 is about 8857.0302020485. The cubic root of 78446984 is about 428.0804722475.

The spelling of 78446984 in words is "seventy-eight million, four hundred forty-six thousand, nine hundred eighty-four".