78806271 has 16 divisors (see below), whose sum is σ = 112921344. Its totient is φ = 48706944.

The previous prime is 78806267. The next prime is 78806279. The reversal of 78806271 is 17260887.

It is not a de Polignac number, because 78806271 - 2² = 78806267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78806279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8115 + ... + 14948.

It is an arithmetic number, because the mean of its divisors is an integer number (7057584).

Almost surely, 2^78806271 is an apocalyptic number.

78806271 is a deficient number, since it is larger than the sum of its proper divisors (34115073).

78806271 is a wasteful number, since it uses less digits than its factorization.

78806271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23150.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 78806271 is about 8877.2896201487. The cubic root of 78806271 is about 428.7330128956.

The spelling of 78806271 in words is "seventy-eight million, eight hundred six thousand, two hundred seventy-one".