78710378 has 4 divisors (see below), whose sum is σ = 118065570. Its totient is φ = 39355188.

The previous prime is 78710371. The next prime is 78710389. The reversal of 78710378 is 87301787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78552769 + 157609 = 8863^2 + 397^2 .

It is not an unprimeable number, because it can be changed into a prime (78710371) 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, 19677593 + ... + 19677596.

Almost surely, 2^78710378 is an apocalyptic number.

78710378 is a deficient number, since it is larger than the sum of its proper divisors (39355192).

78710378 is a wasteful number, since it uses less digits than its factorization.

78710378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39355191.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 78710378 is about 8871.8869469803. The cubic root of 78710378 is about 428.5590454306.

The spelling of 78710378 in words is "seventy-eight million, seven hundred ten thousand, three hundred seventy-eight".