78680916 has 24 divisors (see below), whose sum is σ = 203987840. Its totient is φ = 26226936.

The previous prime is 78680891. The next prime is 78680923. The reversal of 78680916 is 61908687.

It is a happy number.

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, 364156 + ... + 364371.

Almost surely, 2^78680916 is an apocalyptic number.

It is an amenable number.

78680916 is an abundant number, since it is smaller than the sum of its proper divisors (125306924).

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

78680916 is a wasteful number, since it uses less digits than its factorization.

78680916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728540 (or 728532 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 78680916 is about 8870.2263781710. The cubic root of 78680916 is about 428.5055675936.

The spelling of 78680916 in words is "seventy-eight million, six hundred eighty thousand, nine hundred sixteen".