78256071 has 16 divisors (see below), whose sum is σ = 116190720. Its totient is φ = 52055640.

The previous prime is 78256069. The next prime is 78256093. The reversal of 78256071 is 17065287.

It is not a de Polignac number, because 78256071 - 2¹ = 78256069 is a prime.

It is a super-2 number, since 2×78256071² = 12248025296714082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78256571) 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, 10306 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (7261920).

Almost surely, 2^78256071 is an apocalyptic number.

78256071 is a deficient number, since it is larger than the sum of its proper divisors (37934649).

78256071 is a wasteful number, since it uses less digits than its factorization.

78256071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6403 (or 6397 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 78256071 is about 8846.2461530301. The cubic root of 78256071 is about 427.7329232381.

The spelling of 78256071 in words is "seventy-eight million, two hundred fifty-six thousand, seventy-one".