78807982 has 16 divisors (see below), whose sum is σ = 134566272. Its totient is φ = 34264120.

The previous prime is 78807973. The next prime is 78808001. The reversal of 78807982 is 28970887.

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, 77368 + ... + 78379.

It is an arithmetic number, because the mean of its divisors is an integer number (8410392).

Almost surely, 2^78807982 is an apocalyptic number.

78807982 is a deficient number, since it is larger than the sum of its proper divisors (55758290).

78807982 is a wasteful number, since it uses less digits than its factorization.

78807982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155783.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 78807982 is about 8877.3859891299. The cubic root of 78807982 is about 428.7361156811.

The spelling of 78807982 in words is "seventy-eight million, eight hundred seven thousand, nine hundred eighty-two".