78771448 has 16 divisors (see below), whose sum is σ = 168796080. Its totient is φ = 33759168.

The previous prime is 78771443. The next prime is 78771457. The reversal of 78771448 is 84417787.

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

It is a junction number, because it is equal to n+sod(n) for n = 78771398 and 78771407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78771443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703261 + ... + 703372.

It is an arithmetic number, because the mean of its divisors is an integer number (10549755).

Almost surely, 2^78771448 is an apocalyptic number.

It is an amenable number.

78771448 is an abundant number, since it is smaller than the sum of its proper divisors (90024632).

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

78771448 is a wasteful number, since it uses less digits than its factorization.

78771448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406646 (or 1406642 counting only the distinct ones).

The product of its digits is 351232, while the sum is 46.

The square root of 78771448 is about 8875.3280502751. The cubic root of 78771448 is about 428.6698539231.

The spelling of 78771448 in words is "seventy-eight million, seven hundred seventy-one thousand, four hundred forty-eight".