78774860 has 12 divisors (see below), whose sum is σ = 165427248. Its totient is φ = 31509936.

The previous prime is 78774847. The next prime is 78774881. The reversal of 78774860 is 6847787.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969352 + ... + 1969391.

It is an arithmetic number, because the mean of its divisors is an integer number (13785604).

Almost surely, 2^78774860 is an apocalyptic number.

It is an amenable number.

78774860 is an abundant number, since it is smaller than the sum of its proper divisors (86652388).

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

78774860 is a wasteful number, since it uses less digits than its factorization.

78774860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938752 (or 3938750 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 78774860 is about 8875.5202664407. The cubic root of 78774860 is about 428.6760431387.

The spelling of 78774860 in words is "seventy-eight million, seven hundred seventy-four thousand, eight hundred sixty".