78016786 has 8 divisors (see below), whose sum is σ = 121060620. Its totient is φ = 37663248.

The previous prime is 78016753. The next prime is 78016787. The reversal of 78016786 is 68761087.

It can be written as a sum of positive squares in 2 ways, for example, as 77880625 + 136161 = 8825^2 + 369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78016787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672501 + ... + 672616.

Almost surely, 2^78016786 is an apocalyptic number.

78016786 is a deficient number, since it is larger than the sum of its proper divisors (43043834).

78016786 is a wasteful number, since it uses less digits than its factorization.

78016786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345148.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 78016786 is about 8832.7111353197. The cubic root of 78016786 is about 427.2965159067.

The spelling of 78016786 in words is "seventy-eight million, sixteen thousand, seven hundred eighty-six".