78717012 has 24 divisors (see below), whose sum is σ = 200370912. Its totient is φ = 23853600.

The previous prime is 78716999. The next prime is 78717059. The reversal of 78717012 is 21071787.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 298039 + ... + 298302.

It is an arithmetic number, because the mean of its divisors is an integer number (8348788).

Almost surely, 2^78717012 is an apocalyptic number.

It is an amenable number.

78717012 is an abundant number, since it is smaller than the sum of its proper divisors (121653900).

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

78717012 is a wasteful number, since it uses less digits than its factorization.

78717012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596359 (or 596357 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 78717012 is about 8872.2608167254. The cubic root of 78717012 is about 428.5710852696.

Adding to 78717012 its reverse (21071787), we get a palindrome (99788799).

The spelling of 78717012 in words is "seventy-eight million, seven hundred seventeen thousand, twelve".