78006784 has 40 divisors (see below), whose sum is σ = 156739968. Its totient is φ = 38784000.

The previous prime is 78006763. The next prime is 78006811. The reversal of 78006784 is 48760087.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128209 + ... + 128815.

Almost surely, 2^78006784 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 78006784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78369984).

78006784 is an abundant number, since it is smaller than the sum of its proper divisors (78733184).

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

78006784 is an equidigital number, since it uses as much as digits as its factorization.

78006784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78006784 is about 8832.1449263472. The cubic root of 78006784 is about 427.2782548690.

The spelling of 78006784 in words is "seventy-eight million, six thousand, seven hundred eighty-four".