78670736 has 40 divisors (see below), whose sum is σ = 161388480. Its totient is φ = 37086336.

The previous prime is 78670733. The next prime is 78670751. The reversal of 78670736 is 63707687.

It is not an unprimeable number, because it can be changed into a prime (78670733) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17981 + ... + 21923.

It is an arithmetic number, because the mean of its divisors is an integer number (4034712).

Almost surely, 2^78670736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78670736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80694240).

78670736 is an abundant number, since it is smaller than the sum of its proper divisors (82717744).

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

78670736 is a wasteful number, since it uses less digits than its factorization.

78670736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023 (or 4017 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 78670736 is about 8869.6525298345. The cubic root of 78670736 is about 428.4870863021.

The spelling of 78670736 in words is "seventy-eight million, six hundred seventy thousand, seven hundred thirty-six".