78840058 has 8 divisors (see below), whose sum is σ = 129011040. Its totient is φ = 35836380.

The previous prime is 78840043. The next prime is 78840059. The reversal of 78840058 is 85004887.

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

It is a self number, because there is not a number n which added to its sum of digits gives 78840058.

It is not an unprimeable number, because it can be changed into a prime (78840059) 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, 1791798 + ... + 1791841.

It is an arithmetic number, because the mean of its divisors is an integer number (16126380).

Almost surely, 2^78840058 is an apocalyptic number.

78840058 is a deficient number, since it is larger than the sum of its proper divisors (50170982).

78840058 is a wasteful number, since it uses less digits than its factorization.

78840058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583652.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 78840058 is about 8879.1924182326. The cubic root of 78840058 is about 428.7942750788.

The spelling of 78840058 in words is "seventy-eight million, eight hundred forty thousand, fifty-eight".