78465686 has 24 divisors (see below), whose sum is σ = 128070720. Its totient is φ = 36038496.

The previous prime is 78465683. The next prime is 78465697. The reversal of 78465686 is 68656487.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78465683) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 90491 + ... + 91353.

It is an arithmetic number, because the mean of its divisors is an integer number (5336280).

Almost surely, 2^78465686 is an apocalyptic number.

78465686 is a deficient number, since it is larger than the sum of its proper divisors (49605034).

78465686 is a wasteful number, since it uses less digits than its factorization.

78465686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1147 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 78465686 is about 8858.0859106243. The cubic root of 78465686 is about 428.1144881075.

The spelling of 78465686 in words is "seventy-eight million, four hundred sixty-five thousand, six hundred eighty-six".