78621682 has 16 divisors (see below), whose sum is σ = 126064512. Its totient is φ = 36683680.

The previous prime is 78621649. The next prime is 78621691. The reversal of 78621682 is 28612687.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18958 + ... + 22729.

It is an arithmetic number, because the mean of its divisors is an integer number (7879032).

Almost surely, 2^78621682 is an apocalyptic number.

78621682 is a deficient number, since it is larger than the sum of its proper divisors (47442830).

78621682 is a wasteful number, since it uses less digits than its factorization.

78621682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41753.

The product of its digits is 64512, while the sum is 40.

The square root of 78621682 is about 8866.8868268406. The cubic root of 78621682 is about 428.3980088094.

The spelling of 78621682 in words is "seventy-eight million, six hundred twenty-one thousand, six hundred eighty-two".