78701984 has 12 divisors (see below), whose sum is σ = 154944594. Its totient is φ = 39350976.

The previous prime is 78701981. The next prime is 78701999. The reversal of 78701984 is 48910787.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 28858384 = 7060^2 + 5372^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78701981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1229687 + ... + 1229750.

Almost surely, 2^78701984 is an apocalyptic number.

It is an amenable number.

78701984 is a deficient number, since it is larger than the sum of its proper divisors (76242610).

78701984 is a wasteful number, since it uses less digits than its factorization.

78701984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459447 (or 2459439 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 78701984 is about 8871.4138670226. The cubic root of 78701984 is about 428.5438104531.

The spelling of 78701984 in words is "seventy-eight million, seven hundred one thousand, nine hundred eighty-four".