78681288 has 64 divisors (see below), whose sum is σ = 227036160. Its totient is φ = 22257216.

The previous prime is 78681257. The next prime is 78681289. The reversal of 78681288 is 88218687.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (78681289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15031 + ... + 19577.

It is an arithmetic number, because the mean of its divisors is an integer number (3547440).

Almost surely, 2^78681288 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 78681288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113518080).

78681288 is an abundant number, since it is smaller than the sum of its proper divisors (148354872).

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

78681288 is a wasteful number, since it uses less digits than its factorization.

78681288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666 (or 4662 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The square root of 78681288 is about 8870.2473471713. The cubic root of 78681288 is about 428.5062429112.

The spelling of 78681288 in words is "seventy-eight million, six hundred eighty-one thousand, two hundred eighty-eight".