78729376 has 36 divisors (see below), whose sum is σ = 170378586. Its totient is φ = 35784320.

The previous prime is 78729373. The next prime is 78729419. The reversal of 78729376 is 67392787.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 32216976 = 6820^2 + 5676^2 .

It is not an unprimeable number, because it can be changed into a prime (78729373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6295 + ... + 14038.

Almost surely, 2^78729376 is an apocalyptic number.

It is an amenable number.

78729376 is an abundant number, since it is smaller than the sum of its proper divisors (91649210).

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

78729376 is a wasteful number, since it uses less digits than its factorization.

78729376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20365 (or 20346 counting only the distinct ones).

The product of its digits is 889056, while the sum is 49.

The square root of 78729376 is about 8872.9575678012. The cubic root of 78729376 is about 428.5935225012.

The spelling of 78729376 in words is "seventy-eight million, seven hundred twenty-nine thousand, three hundred seventy-six".