78682216 has 16 divisors (see below), whose sum is σ = 152288640. Its totient is φ = 38071920.

The previous prime is 78682213. The next prime is 78682267. The reversal of 78682216 is 61228687.

It is a super-2 number, since 2×78682216² = 12381782229341312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78682213) 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, 158386 + ... + 158881.

It is an arithmetic number, because the mean of its divisors is an integer number (9518040).

Almost surely, 2^78682216 is an apocalyptic number.

It is an amenable number.

78682216 is a deficient number, since it is larger than the sum of its proper divisors (73606424).

78682216 is a wasteful number, since it uses less digits than its factorization.

78682216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317304 (or 317300 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 78682216 is about 8870.2996567196. The cubic root of 78682216 is about 428.5079275651.

The spelling of 78682216 in words is "seventy-eight million, six hundred eighty-two thousand, two hundred sixteen".