78636271 has 8 divisors (see below), whose sum is σ = 95156640. Its totient is φ = 63437568.

The previous prime is 78636223. The next prime is 78636323. The reversal of 78636271 is 17263687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78636271 - 2⁷ = 78636143 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 (78636221) 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, 330286 + ... + 330523.

It is an arithmetic number, because the mean of its divisors is an integer number (11894580).

Almost surely, 2^78636271 is an apocalyptic number.

78636271 is a deficient number, since it is larger than the sum of its proper divisors (16520369).

78636271 is a wasteful number, since it uses less digits than its factorization.

78636271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660833.

The product of its digits is 84672, while the sum is 40.

The square root of 78636271 is about 8867.7094562237. The cubic root of 78636271 is about 428.4245049440.

The spelling of 78636271 in words is "seventy-eight million, six hundred thirty-six thousand, two hundred seventy-one".