78549216 has 48 divisors (see below), whose sum is σ = 206769024. Its totient is φ = 26109824.

The previous prime is 78549203. The next prime is 78549227. The reversal of 78549216 is 61294587.

It is a tau number, because it is divible by the number of its divisors (48).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41605 + ... + 43451.

It is an arithmetic number, because the mean of its divisors is an integer number (4307688).

Almost surely, 2^78549216 is an apocalyptic number.

It is an amenable number.

78549216 is an abundant number, since it is smaller than the sum of its proper divisors (128219808).

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

78549216 is a wasteful number, since it uses less digits than its factorization.

With its successor (78549217) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (2303).

78549216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303 (or 2295 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 78549216 is about 8862.7995577018. The cubic root of 78549216 is about 428.2663494838.

The spelling of 78549216 in words is "seventy-eight million, five hundred forty-nine thousand, two hundred sixteen".