78814772 has 12 divisors (see below), whose sum is σ = 142375296. Its totient is φ = 38136120.

The previous prime is 78814733. The next prime is 78814777. The reversal of 78814772 is 27741887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78814777) 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, 317678 + ... + 317925.

It is an arithmetic number, because the mean of its divisors is an integer number (11864608).

Almost surely, 2^78814772 is an apocalyptic number.

It is an amenable number.

78814772 is a deficient number, since it is larger than the sum of its proper divisors (63560524).

78814772 is a wasteful number, since it uses less digits than its factorization.

78814772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635638 (or 635636 counting only the distinct ones).

The product of its digits is 175616, while the sum is 44.

The square root of 78814772 is about 8877.7684132895. The cubic root of 78814772 is about 428.7484284552.

The spelling of 78814772 in words is "seventy-eight million, eight hundred fourteen thousand, seven hundred seventy-two".