78981284 has 12 divisors (see below), whose sum is σ = 138548508. Its totient is φ = 39396000.

The previous prime is 78981283. The next prime is 78981299. The reversal of 78981284 is 48218987.

It can be written as a sum of positive squares in 2 ways, for example, as 32741284 + 46240000 = 5722^2 + 6800^2 .

It is not an unprimeable number, because it can be changed into a prime (78981281) 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 in 3 ways as a sum of consecutive naturals, for example, 21767 + ... + 25134.

It is an arithmetic number, because the mean of its divisors is an integer number (11545709).

Almost surely, 2^78981284 is an apocalyptic number.

It is an amenable number.

78981284 is a deficient number, since it is larger than the sum of its proper divisors (59567224).

78981284 is a wasteful number, since it uses less digits than its factorization.

78981284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47326 (or 47324 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 78981284 is about 8887.1414976920. The cubic root of 78981284 is about 429.0501550604.

The spelling of 78981284 in words is "seventy-eight million, nine hundred eighty-one thousand, two hundred eighty-four".