78864014 has 4 divisors (see below), whose sum is σ = 118296024. Its totient is φ = 39432006.

The previous prime is 78864011. The next prime is 78864059. The reversal of 78864014 is 41046887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41046887 = 7 ⋅5863841.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78864011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19716002 + ... + 19716005.

It is an arithmetic number, because the mean of its divisors is an integer number (29574006).

Almost surely, 2^78864014 is an apocalyptic number.

78864014 is a deficient number, since it is larger than the sum of its proper divisors (39432010).

78864014 is a wasteful number, since it uses less digits than its factorization.

78864014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39432009.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 78864014 is about 8880.5413123300. The cubic root of 78864014 is about 428.8377012070.

The spelling of 78864014 in words is "seventy-eight million, eight hundred sixty-four thousand, fourteen".