78622686 has 12 divisors (see below), whose sum is σ = 170349192. Its totient is φ = 26207556.

The previous prime is 78622673. The next prime is 78622693. The reversal of 78622686 is 68622687.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2183946 + ... + 2183981.

It is an arithmetic number, because the mean of its divisors is an integer number (14195766).

Almost surely, 2^78622686 is an apocalyptic number.

78622686 is an abundant number, since it is smaller than the sum of its proper divisors (91726506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78622686 is a wasteful number, since it uses less digits than its factorization.

78622686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367935 (or 4367932 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 78622686 is about 8866.9434417955. The cubic root of 78622686 is about 428.3998323512.

Subtracting from 78622686 its reverse (68622687), we obtain a palindrome (9999999).

The spelling of 78622686 in words is "seventy-eight million, six hundred twenty-two thousand, six hundred eighty-six".