78500018 has 8 divisors (see below), whose sum is σ = 118308720. Its totient is φ = 39063780.

The previous prime is 78500003. The next prime is 78500021. The reversal of 78500018 is 81000587.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92588 + ... + 93431.

It is an arithmetic number, because the mean of its divisors is an integer number (14788590).

Almost surely, 2^78500018 is an apocalyptic number.

78500018 is a deficient number, since it is larger than the sum of its proper divisors (39808702).

78500018 is a wasteful number, since it uses less digits than its factorization.

78500018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186232.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 78500018 is about 8860.0235891334. The cubic root of 78500018 is about 428.1769182992.

The spelling of 78500018 in words is "seventy-eight million, five hundred thousand, eighteen".