82808778 has 16 divisors (see below), whose sum is σ = 178357536. Its totient is φ = 25479600.

The previous prime is 82808743. The next prime is 82808839. The reversal of 82808778 is 87780828.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530748 + ... + 530903.

It is an arithmetic number, because the mean of its divisors is an integer number (11147346).

Almost surely, 2^82808778 is an apocalyptic number.

82808778 is an abundant number, since it is smaller than the sum of its proper divisors (95548758).

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

82808778 is a wasteful number, since it uses less digits than its factorization.

82808778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061669.

The product of its (nonzero) digits is 401408, while the sum is 48.

The square root of 82808778 is about 9099.9328568952. The cubic root of 82808778 is about 435.8718200480.

The spelling of 82808778 in words is "eighty-two million, eight hundred eight thousand, seven hundred seventy-eight".