78329986 has 16 divisors (see below), whose sum is σ = 138911040. Its totient is φ = 32412240.

The previous prime is 78329983. The next prime is 78330037. The reversal of 78329986 is 68992387.

It is a super-2 number, since 2×78329986² = 12271173413520392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78329983) 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 7 ways as a sum of consecutive naturals, for example, 96060 + ... + 96871.

It is an arithmetic number, because the mean of its divisors is an integer number (8681940).

Almost surely, 2^78329986 is an apocalyptic number.

78329986 is a deficient number, since it is larger than the sum of its proper divisors (60581054).

78329986 is a wasteful number, since it uses less digits than its factorization.

78329986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192969.

The product of its digits is 1306368, while the sum is 52.

The square root of 78329986 is about 8850.4229277476. The cubic root of 78329986 is about 427.8675493436.

The spelling of 78329986 in words is "seventy-eight million, three hundred twenty-nine thousand, nine hundred eighty-six".