1978122883 has 16 divisors (see below), whose sum is σ = 2181594240. Its totient is φ = 1793495880.

The previous prime is 1978122871. The next prime is 1978122893. The reversal of 1978122883 is 3882218791.

It is not a de Polignac number, because 1978122883 - 2⁹ = 1978122371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1978122893) 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, 555916 + ... + 559462.

It is an arithmetic number, because the mean of its divisors is an integer number (136349640).

Almost surely, 2^1978122883 is an apocalyptic number.

1978122883 is a deficient number, since it is larger than the sum of its proper divisors (203471357).

1978122883 is an equidigital number, since it uses as much as digits as its factorization.

1978122883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999 (or 3977 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The square root of 1978122883 is about 44476.0933873469. The cubic root of 1978122883 is about 1255.3102904135.

The spelling of 1978122883 in words is "one billion, nine hundred seventy-eight million, one hundred twenty-two thousand, eight hundred eighty-three".