78158448 has 60 divisors (see below), whose sum is σ = 222027208. Its totient is φ = 25660800.

The previous prime is 78158441. The next prime is 78158461. The reversal of 78158448 is 84485187.

It is a super-2 number, since 2×78158448² = 12217485987537408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78158441) 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, 5598 + ... + 13698.

Almost surely, 2^78158448 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 78158448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111013604).

78158448 is an abundant number, since it is smaller than the sum of its proper divisors (143868760).

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

78158448 is a wasteful number, since it uses less digits than its factorization.

78158448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182 (or 8173 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 78158448 is about 8840.7266669658. The cubic root of 78158448 is about 427.5549862585.

It can be divided in two parts, 78158 and 448, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 78158448 in words is "seventy-eight million, one hundred fifty-eight thousand, four hundred forty-eight".