78518414 has 12 divisors (see below), whose sum is σ = 127534896. Its totient is φ = 36239112.

The previous prime is 78518413. The next prime is 78518417. The reversal of 78518414 is 41481587.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78518411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115814 + ... + 116489.

It is an arithmetic number, because the mean of its divisors is an integer number (10627908).

Almost surely, 2^78518414 is an apocalyptic number.

78518414 is a deficient number, since it is larger than the sum of its proper divisors (49016482).

78518414 is a wasteful number, since it uses less digits than its factorization.

78518414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232331 (or 232318 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 78518414 is about 8861.0616745399. The cubic root of 78518414 is about 428.2103625691.

The spelling of 78518414 in words is "seventy-eight million, five hundred eighteen thousand, four hundred fourteen".