78554448 has 150 divisors (see below), whose sum is σ = 264693066. Its totient is φ = 22425984.

The previous prime is 78554431. The next prime is 78554459. The reversal of 78554448 is 84445587.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 5143824 = 8568^2 + 2268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 62886 + ... + 64122.

Almost surely, 2^78554448 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 78554448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132346533).

78554448 is an abundant number, since it is smaller than the sum of its proper divisors (186138618).

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

78554448 is a wasteful number, since it uses less digits than its factorization.

78554448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1249 counting only the distinct ones).

The product of its digits is 716800, while the sum is 45.

The square root of 78554448 is about 8863.0947191148. The cubic root of 78554448 is about 428.2758579165.

The spelling of 78554448 in words is "seventy-eight million, five hundred fifty-four thousand, four hundred forty-eight".