78317448 has 64 divisors (see below), whose sum is σ = 218592000. Its totient is φ = 23177280.

The previous prime is 78317443. The next prime is 78317513. The reversal of 78317448 is 84471387.

It is a super-2 number, since 2×78317448² = 12267245322465408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78317443) 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 15 ways as a sum of consecutive naturals, for example, 7903 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (3415500).

Almost surely, 2^78317448 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 78317448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109296000).

78317448 is an abundant number, since it is smaller than the sum of its proper divisors (140274552).

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

78317448 is a wasteful number, since it uses less digits than its factorization.

78317448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962 (or 6958 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 78317448 is about 8849.7145716684. The cubic root of 78317448 is about 427.8447190506.

The spelling of 78317448 in words is "seventy-eight million, three hundred seventeen thousand, four hundred forty-eight".