78489768 has 96 divisors (see below), whose sum is σ = 235733760. Its totient is φ = 21692160.

The previous prime is 78489757. The next prime is 78489793. The reversal of 78489768 is 86798487.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35380 + ... + 37532.

It is an arithmetic number, because the mean of its divisors is an integer number (2455560).

Almost surely, 2^78489768 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 78489768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117866880).

78489768 is an abundant number, since it is smaller than the sum of its proper divisors (157243992).

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

78489768 is a wasteful number, since it uses less digits than its factorization.

78489768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207 (or 2196 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 78489768 is about 8859.4451293521. The cubic root of 78489768 is about 428.1582813419.

The spelling of 78489768 in words is "seventy-eight million, four hundred eighty-nine thousand, seven hundred sixty-eight".