78878714 has 16 divisors (see below), whose sum is σ = 119694120. Its totient is φ = 38983680.

The previous prime is 78878713. The next prime is 78878719. The reversal of 78878714 is 41787887.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15405625 + 63473089 = 3925^2 + 7967^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78878713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69302 + ... + 70430.

Almost surely, 2^78878714 is an apocalyptic number.

78878714 is a deficient number, since it is larger than the sum of its proper divisors (40815406).

78878714 is a wasteful number, since it uses less digits than its factorization.

78878714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its digits is 702464, while the sum is 50.

The square root of 78878714 is about 8881.3689260159. The cubic root of 78878714 is about 428.8643442104.

The spelling of 78878714 in words is "seventy-eight million, eight hundred seventy-eight thousand, seven hundred fourteen".