78817548 has 48 divisors (see below), whose sum is σ = 198840320. Its totient is φ = 24214464.

The previous prime is 78817537. The next prime is 78817553. The reversal of 78817548 is 84571887.

It is a junction number, because it is equal to n+sod(n) for n = 78817497 and 78817506.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3765 + ... + 13107.

Almost surely, 2^78817548 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 78817548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99420160).

78817548 is an abundant number, since it is smaller than the sum of its proper divisors (120022772).

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

78817548 is a wasteful number, since it uses less digits than its factorization.

78817548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9406 (or 9404 counting only the distinct ones).

The product of its digits is 501760, while the sum is 48.

The square root of 78817548 is about 8877.9247575095. The cubic root of 78817548 is about 428.7534621633.

It can be divided in two parts, 788 and 17548, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 78817548 in words is "seventy-eight million, eight hundred seventeen thousand, five hundred forty-eight".