78805388 has 12 divisors (see below), whose sum is σ = 145167960. Its totient is φ = 37328832.

The previous prime is 78805373. The next prime is 78805399. The reversal of 78805388 is 88350887.

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 3 ways as a sum of consecutive naturals, for example, 518381 + ... + 518532.

It is an arithmetic number, because the mean of its divisors is an integer number (12097330).

Almost surely, 2^78805388 is an apocalyptic number.

It is an amenable number.

78805388 is a deficient number, since it is larger than the sum of its proper divisors (66362572).

78805388 is a wasteful number, since it uses less digits than its factorization.

78805388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036936 (or 1036934 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 78805388 is about 8877.2398863611. The cubic root of 78805388 is about 428.7314116158.

The spelling of 78805388 in words is "seventy-eight million, eight hundred five thousand, three hundred eighty-eight".