78729016 has 8 divisors (see below), whose sum is σ = 147616920. Its totient is φ = 39364504.

The previous prime is 78728999. The next prime is 78729029. The reversal of 78729016 is 61092787.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78729016.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4920556 + ... + 4920571.

It is an arithmetic number, because the mean of its divisors is an integer number (18452115).

Almost surely, 2^78729016 is an apocalyptic number.

It is an amenable number.

78729016 is a deficient number, since it is larger than the sum of its proper divisors (68887904).

78729016 is a wasteful number, since it uses less digits than its factorization.

78729016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9841133 (or 9841129 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 78729016 is about 8872.9372814193. The cubic root of 78729016 is about 428.5928692342.

The spelling of 78729016 in words is "seventy-eight million, seven hundred twenty-nine thousand, sixteen".