78319982 has 16 divisors (see below), whose sum is σ = 126896112. Its totient is φ = 36039360.

The previous prime is 78319973. The next prime is 78319999. The reversal of 78319982 is 28991387.

It is a super-2 number, since 2×78319982² = 12268039160960648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4682 + ... + 13362.

It is an arithmetic number, because the mean of its divisors is an integer number (7931007).

Almost surely, 2^78319982 is an apocalyptic number.

78319982 is a deficient number, since it is larger than the sum of its proper divisors (48576130).

78319982 is a wasteful number, since it uses less digits than its factorization.

78319982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043.

The product of its digits is 217728, while the sum is 47.

The square root of 78319982 is about 8849.8577389696. The cubic root of 78319982 is about 427.8493333771.

The spelling of 78319982 in words is "seventy-eight million, three hundred nineteen thousand, nine hundred eighty-two".