78863616 has 108 divisors (see below), whose sum is σ = 244967268. Its totient is φ = 24256512.

The previous prime is 78863611. The next prime is 78863621. The reversal of 78863616 is 61636887.

78863616 is a `hidden beast` number, since 7 + 8 + 8 + 636 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (78863611) and next prime (78863621).

It can be written as a sum of positive squares in 2 ways, for example, as 12278016 + 66585600 = 3504^2 + 8160^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78863611) 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 11 ways as a sum of consecutive naturals, for example, 28636 + ... + 31268.

Almost surely, 2^78863616 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 78863616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122483634).

78863616 is an abundant number, since it is smaller than the sum of its proper divisors (166103652).

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

78863616 is a wasteful number, since it uses less digits than its factorization.

78863616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668 (or 2651 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 78863616 is about 8880.5189037578. The cubic root of 78863616 is about 428.8369798062.

The spelling of 78863616 in words is "seventy-eight million, eight hundred sixty-three thousand, six hundred sixteen".