1022656778 has 64 divisors (see below), whose sum is σ = 1853978112. Its totient is φ = 416940480.

The previous prime is 1022656771. The next prime is 1022656813. The reversal of 1022656778 is 8776562201.

It is not an unprimeable number, because it can be changed into a prime (1022656771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1590125 + ... + 1590767.

It is an arithmetic number, because the mean of its divisors is an integer number (28968408).

Almost surely, 2^1022656778 is an apocalyptic number.

1022656778 is a deficient number, since it is larger than the sum of its proper divisors (831321334).

1022656778 is a wasteful number, since it uses less digits than its factorization.

1022656778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 1022656778 is about 31979.0052690824. The cubic root of 1022656778 is about 1007.4959299710.

The spelling of 1022656778 in words is "one billion, twenty-two million, six hundred fifty-six thousand, seven hundred seventy-eight".