78047782 has 16 divisors (see below), whose sum is σ = 130483440. Its totient is φ = 34795008.

The previous prime is 78047779. The next prime is 78047791. The reversal of 78047782 is 28774087.

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, 59763 + ... + 61054.

It is an arithmetic number, because the mean of its divisors is an integer number (8155215).

Almost surely, 2^78047782 is an apocalyptic number.

78047782 is a deficient number, since it is larger than the sum of its proper divisors (52435658).

78047782 is a wasteful number, since it uses less digits than its factorization.

78047782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120855.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 78047782 is about 8834.4655752343. The cubic root of 78047782 is about 427.3530965900.

The spelling of 78047782 in words is "seventy-eight million, forty-seven thousand, seven hundred eighty-two".