78839804 has 12 divisors (see below), whose sum is σ = 138238128. Its totient is φ = 39343200.

The previous prime is 78839767. The next prime is 78839807. The reversal of 78839804 is 40893887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78839807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16832 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (11519844).

Almost surely, 2^78839804 is an apocalyptic number.

It is an amenable number.

78839804 is a deficient number, since it is larger than the sum of its proper divisors (59398324).

78839804 is a wasteful number, since it uses less digits than its factorization.

78839804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38356 (or 38354 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 78839804 is about 8879.1781151185. The cubic root of 78839804 is about 428.7938145944.

The spelling of 78839804 in words is "seventy-eight million, eight hundred thirty-nine thousand, eight hundred four".