78778704 has 40 divisors (see below), whose sum is σ = 204049440. Its totient is φ = 26190208.

The previous prime is 78778669. The next prime is 78778787. The reversal of 78778704 is 40787787.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18154 + ... + 22070.

It is an arithmetic number, because the mean of its divisors is an integer number (5101236).

Almost surely, 2^78778704 is an apocalyptic number.

It is an amenable number.

78778704 is an abundant number, since it is smaller than the sum of its proper divisors (125270736).

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

78778704 is a wasteful number, since it uses less digits than its factorization.

78778704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347 (or 4341 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 48.

The square root of 78778704 is about 8875.7368144848. The cubic root of 78778704 is about 428.6830157689.

The spelling of 78778704 in words is "seventy-eight million, seven hundred seventy-eight thousand, seven hundred four".