78916680 has 192 divisors, whose sum is σ = 278328960. Its totient is φ = 20072448.

The previous prime is 78916679. The next prime is 78916697. The reversal of 78916680 is 8661987.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223384 + ... + 223736.

It is an arithmetic number, because the mean of its divisors is an integer number (1449630).

Almost surely, 2^78916680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78916680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139164480).

78916680 is an abundant number, since it is smaller than the sum of its proper divisors (199412280).

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

78916680 is a wasteful number, since it uses less digits than its factorization.

78916680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 386 counting only the distinct ones).

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

The square root of 78916680 is about 8883.5060646121. The cubic root of 78916680 is about 428.9331403458.

The spelling of 78916680 in words is "seventy-eight million, nine hundred sixteen thousand, six hundred eighty".