78678271 has 12 divisors (see below), whose sum is σ = 92369640. Its totient is φ = 66815280.

The previous prime is 78678253. The next prime is 78678283. The reversal of 78678271 is 17287687.

It is not a de Polignac number, because 78678271 - 2⁷ = 78678143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78678241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2025 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (7697470).

Almost surely, 2^78678271 is an apocalyptic number.

78678271 is a deficient number, since it is larger than the sum of its proper divisors (13691369).

78678271 is a wasteful number, since it uses less digits than its factorization.

78678271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14854 (or 14847 counting only the distinct ones).

The product of its digits is 263424, while the sum is 46.

The square root of 78678271 is about 8870.0772826397. The cubic root of 78678271 is about 428.5007658789.

The spelling of 78678271 in words is "seventy-eight million, six hundred seventy-eight thousand, two hundred seventy-one".