78549648 has 80 divisors (see below), whose sum is σ = 218676480. Its totient is φ = 24216192.

The previous prime is 78549637. The next prime is 78549701. The reversal of 78549648 is 84694587.

It is a self number, because there is not a number n which added to its sum of digits gives 78549648.

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, 38215 + ... + 40217.

It is an arithmetic number, because the mean of its divisors is an integer number (2733456).

Almost surely, 2^78549648 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 78549648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109338240).

78549648 is an abundant number, since it is smaller than the sum of its proper divisors (140126832).

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

78549648 is a wasteful number, since it uses less digits than its factorization.

78549648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 2070 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 78549648 is about 8862.8239292000. The cubic root of 78549648 is about 428.2671345997.

It can be divided in two parts, 78549 and 648, that added together give a palindrome (79197).

The spelling of 78549648 in words is "seventy-eight million, five hundred forty-nine thousand, six hundred forty-eight".