78900986 has 8 divisors (see below), whose sum is σ = 118389600. Its totient is φ = 39437788.

The previous prime is 78900959. The next prime is 78900989. The reversal of 78900986 is 68900987.

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 78900986.

It is not an unprimeable number, because it can be changed into a prime (78900989) 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, 7145 + ... + 14451.

It is an arithmetic number, because the mean of its divisors is an integer number (14798700).

Almost surely, 2^78900986 is an apocalyptic number.

78900986 is a deficient number, since it is larger than the sum of its proper divisors (39488614).

78900986 is a wasteful number, since it uses less digits than its factorization.

78900986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12708.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 78900986 is about 8882.6226982801. The cubic root of 78900986 is about 428.9047047730.

Subtracting from 78900986 its reverse (68900987), we obtain a palindrome (9999999).

The spelling of 78900986 in words is "seventy-eight million, nine hundred thousand, nine hundred eighty-six".