78422071 has 32 divisors (see below), whose sum is σ = 103154688. Its totient is φ = 57853440.

The previous prime is 78422059. The next prime is 78422077. The reversal of 78422071 is 17022487.

It is a cyclic number.

It is not a de Polignac number, because 78422071 - 2⁵ = 78422039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78422077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252006 + ... + 252316.

It is an arithmetic number, because the mean of its divisors is an integer number (3223584).

Almost surely, 2^78422071 is an apocalyptic number.

78422071 is a deficient number, since it is larger than the sum of its proper divisors (24732617).

78422071 is a wasteful number, since it uses less digits than its factorization.

78422071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 78422071 is about 8855.6236934504. The cubic root of 78422071 is about 428.0351512021.

The spelling of 78422071 in words is "seventy-eight million, four hundred twenty-two thousand, seventy-one".