78480271 has 4 divisors (see below), whose sum is σ = 80150112. Its totient is φ = 76810432.

The previous prime is 78480247. The next prime is 78480277. The reversal of 78480271 is 17208487.

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

It is a cyclic number.

It is not a de Polignac number, because 78480271 - 2¹⁷ = 78349199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78480271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78480277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834850 + ... + 834943.

It is an arithmetic number, because the mean of its divisors is an integer number (20037528).

Almost surely, 2^78480271 is an apocalyptic number.

78480271 is a deficient number, since it is larger than the sum of its proper divisors (1669841).

78480271 is a wasteful number, since it uses less digits than its factorization.

78480271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669840.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 78480271 is about 8858.9091314902. The cubic root of 78480271 is about 428.1410120710.

The spelling of 78480271 in words is "seventy-eight million, four hundred eighty thousand, two hundred seventy-one".