78774842 has 8 divisors (see below), whose sum is σ = 118293600. Its totient is φ = 39343644.

The previous prime is 78774841. The next prime is 78774847. The reversal of 78774842 is 24847787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78774841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19592 + ... + 23267.

It is an arithmetic number, because the mean of its divisors is an integer number (14786700).

Almost surely, 2^78774842 is an apocalyptic number.

78774842 is a deficient number, since it is larger than the sum of its proper divisors (39518758).

78774842 is a wasteful number, since it uses less digits than its factorization.

78774842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43780.

The product of its digits is 702464, while the sum is 47.

The square root of 78774842 is about 8875.5192524156. The cubic root of 78774842 is about 428.6760104880.

The spelling of 78774842 in words is "seventy-eight million, seven hundred seventy-four thousand, eight hundred forty-two".