78729396 has 12 divisors (see below), whose sum is σ = 183701952. Its totient is φ = 26243128.

The previous prime is 78729373. The next prime is 78729419. The reversal of 78729396 is 69392787.

It is an interprime number because it is at equal distance from previous prime (78729373) and next prime (78729419).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280380 + ... + 3280403.

It is an arithmetic number, because the mean of its divisors is an integer number (15308496).

Almost surely, 2^78729396 is an apocalyptic number.

It is an amenable number.

78729396 is an abundant number, since it is smaller than the sum of its proper divisors (104972556).

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

78729396 is a wasteful number, since it uses less digits than its factorization.

78729396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560790 (or 6560788 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 78729396 is about 8872.9586948210. The cubic root of 78729396 is about 428.5935587937.

The spelling of 78729396 in words is "seventy-eight million, seven hundred twenty-nine thousand, three hundred ninety-six".