78780516 has 48 divisors (see below), whose sum is σ = 199402560. Its totient is φ = 24110080.

The previous prime is 78780509. The next prime is 78780539. The reversal of 78780516 is 61508787.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3655 + ... + 13073.

It is an arithmetic number, because the mean of its divisors is an integer number (4154220).

Almost surely, 2^78780516 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 78780516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99701280).

78780516 is an abundant number, since it is smaller than the sum of its proper divisors (120622044).

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

78780516 is a wasteful number, since it uses less digits than its factorization.

78780516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484 (or 9482 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 78780516 is about 8875.8388899303. The cubic root of 78780516 is about 428.6863024764.

The spelling of 78780516 in words is "seventy-eight million, seven hundred eighty thousand, five hundred sixteen".