78688078 has 16 divisors (see below), whose sum is σ = 139546080. Its totient is φ = 32560416.

The previous prime is 78688073. The next prime is 78688097. The reversal of 78688078 is 87088687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78688073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96501 + ... + 97312.

It is an arithmetic number, because the mean of its divisors is an integer number (8721630).

Almost surely, 2^78688078 is an apocalyptic number.

78688078 is a deficient number, since it is larger than the sum of its proper divisors (60858002).

78688078 is a wasteful number, since it uses less digits than its factorization.

78688078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193851.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The square root of 78688078 is about 8870.6300790868. The cubic root of 78688078 is about 428.5185688986.

The spelling of 78688078 in words is "seventy-eight million, six hundred eighty-eight thousand, seventy-eight".