78698216 has 32 divisors (see below), whose sum is σ = 151077960. Its totient is φ = 38418432.

The previous prime is 78698197. The next prime is 78698231. The reversal of 78698216 is 61289687.

It can be written as a sum of positive squares in 4 ways, for example, as 55562116 + 23136100 = 7454^2 + 4810^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132416 + ... + 133008.

Almost surely, 2^78698216 is an apocalyptic number.

It is an amenable number.

78698216 is a deficient number, since it is larger than the sum of its proper divisors (72379744).

78698216 is a wasteful number, since it uses less digits than its factorization.

78698216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 961 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 78698216 is about 8871.2014969789. The cubic root of 78698216 is about 428.5369712403.

The spelling of 78698216 in words is "seventy-eight million, six hundred ninety-eight thousand, two hundred sixteen".