78701864 has 16 divisors (see below), whose sum is σ = 147940020. Its totient is φ = 39251200.

The previous prime is 78701863. The next prime is 78701869. The reversal of 78701864 is 46810787.

It can be written as a sum of positive squares in 2 ways, for example, as 78676900 + 24964 = 8870^2 + 158^2 .

It is not an unprimeable number, because it can be changed into a prime (78701863) 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, 9059 + ... + 15474.

Almost surely, 2^78701864 is an apocalyptic number.

It is an amenable number.

78701864 is a deficient number, since it is larger than the sum of its proper divisors (69238156).

78701864 is a wasteful number, since it uses less digits than its factorization.

78701864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24940 (or 24936 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78701864 is about 8871.4071037237. The cubic root of 78701864 is about 428.5435926471.

The spelling of 78701864 in words is "seventy-eight million, seven hundred one thousand, eight hundred sixty-four".