78442448 has 40 divisors (see below), whose sum is σ = 179690880. Its totient is φ = 32457600.

The previous prime is 78442423. The next prime is 78442517. The reversal of 78442448 is 84424487.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8828 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (4492272).

Almost surely, 2^78442448 is an apocalyptic number.

It is an amenable number.

78442448 is an abundant number, since it is smaller than the sum of its proper divisors (101248432).

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

78442448 is a wasteful number, since it uses less digits than its factorization.

78442448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24195 (or 24189 counting only the distinct ones).

The product of its digits is 229376, while the sum is 41.

The square root of 78442448 is about 8856.7741305737. The cubic root of 78442448 is about 428.0722211955.

The spelling of 78442448 in words is "seventy-eight million, four hundred forty-two thousand, four hundred forty-eight".