78007814 has 4 divisors (see below), whose sum is σ = 117011724. Its totient is φ = 39003906.

The previous prime is 78007793. The next prime is 78007817. The reversal of 78007814 is 41870087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41870087 = 7 ⋅5981441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78007817) 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, 19501952 + ... + 19501955.

It is an arithmetic number, because the mean of its divisors is an integer number (29252931).

Almost surely, 2^78007814 is an apocalyptic number.

78007814 is a deficient number, since it is larger than the sum of its proper divisors (39003910).

78007814 is a wasteful number, since it uses less digits than its factorization.

78007814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39003909.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 78007814 is about 8832.2032358863. The cubic root of 78007814 is about 427.2801354519.

The spelling of 78007814 in words is "seventy-eight million, seven thousand, eight hundred fourteen".