78704208 has 90 divisors (see below), whose sum is σ = 242160282. Its totient is φ = 23844480.

The previous prime is 78704207. The next prime is 78704221. The reversal of 78704208 is 80240787.

It can be written as a sum of positive squares in only one way, i.e., 41835024 + 36869184 = 6468^2 + 6072^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78704207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15166 + ... + 19682.

Almost surely, 2^78704208 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 78704208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121080141).

78704208 is an abundant number, since it is smaller than the sum of its proper divisors (163456074).

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

78704208 is a wasteful number, since it uses less digits than its factorization.

78704208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 78704208 is about 8871.5392125606. The cubic root of 78704208 is about 428.5478470834.

The spelling of 78704208 in words is "seventy-eight million, seven hundred four thousand, two hundred eight".