827042778 has 32 divisors (see below), whose sum is σ = 1844541120. Its totient is φ = 274680720.

The previous prime is 827042771. The next prime is 827042789. The reversal of 827042778 is 877240728.

It is not an unprimeable number, because it can be changed into a prime (827042771) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12688 + ... + 42603.

It is an arithmetic number, because the mean of its divisors is an integer number (57641910).

Almost surely, 2^827042778 is an apocalyptic number.

827042778 is an abundant number, since it is smaller than the sum of its proper divisors (1017498342).

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

827042778 is a wasteful number, since it uses less digits than its factorization.

827042778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55579 (or 55573 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 827042778 is about 28758.3514478838. The cubic root of 827042778 is about 938.6621900333.

The spelling of 827042778 in words is "eight hundred twenty-seven million, forty-two thousand, seven hundred seventy-eight".