78049904 has 20 divisors (see below), whose sum is σ = 156437160. Its totient is φ = 37679040.

The previous prime is 78049903. The next prime is 78049919. The reversal of 78049904 is 40994087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78049901) by changing a digit.

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, 83642 + ... + 84569.

It is an arithmetic number, because the mean of its divisors is an integer number (7821858).

Almost surely, 2^78049904 is an apocalyptic number.

It is an amenable number.

78049904 is an abundant number, since it is smaller than the sum of its proper divisors (78387256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78049904 is a wasteful number, since it uses less digits than its factorization.

78049904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168248 (or 168242 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 78049904 is about 8834.5856722316. The cubic root of 78049904 is about 427.3569695809.

The spelling of 78049904 in words is "seventy-eight million, forty-nine thousand, nine hundred four".