78632686 has 16 divisors (see below), whose sum is σ = 129035520. Its totient is φ = 35641080.

The previous prime is 78632677. The next prime is 78632689. The reversal of 78632686 is 68623687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78632689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3205 + ... + 12943.

It is an arithmetic number, because the mean of its divisors is an integer number (8064720).

Almost surely, 2^78632686 is an apocalyptic number.

78632686 is a deficient number, since it is larger than the sum of its proper divisors (50402834).

78632686 is a wasteful number, since it uses less digits than its factorization.

78632686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10119.

The product of its digits is 580608, while the sum is 46.

The square root of 78632686 is about 8867.5073160387. The cubic root of 78632686 is about 428.4179942708.

The spelling of 78632686 in words is "seventy-eight million, six hundred thirty-two thousand, six hundred eighty-six".