78864700 has 72 divisors (see below), whose sum is σ = 189175392. Its totient is φ = 28385280.

The previous prime is 78864697. The next prime is 78864701. The reversal of 78864700 is 746887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78864701) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 38092 + ... + 40108.

It is an arithmetic number, because the mean of its divisors is an integer number (2627436).

Almost surely, 2^78864700 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 78864700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94587696).

78864700 is an abundant number, since it is smaller than the sum of its proper divisors (110310692).

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

78864700 is a wasteful number, since it uses less digits than its factorization.

78864700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78864700 is about 8880.5799360177. The cubic root of 78864700 is about 428.8389446208.

The spelling of 78864700 in words is "seventy-eight million, eight hundred sixty-four thousand, seven hundred".