1978704008 has 16 divisors (see below), whose sum is σ = 3722736780. Its totient is φ = 985974208.

The previous prime is 1978703971. The next prime is 1978704047. The reversal of 1978704008 is 8004078791.

It can be written as a sum of positive squares in 2 ways, for example, as 1799626084 + 179077924 = 42422^2 + 13382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1978704008.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 419735 + ... + 424422.

Almost surely, 2^1978704008 is an apocalyptic number.

It is an amenable number.

1978704008 is a deficient number, since it is larger than the sum of its proper divisors (1744032772).

1978704008 is a wasteful number, since it uses less digits than its factorization.

1978704008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844456 (or 844452 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 1978704008 is about 44482.6259116973. The cubic root of 1978704008 is about 1255.4332050505.

The spelling of 1978704008 in words is "one billion, nine hundred seventy-eight million, seven hundred four thousand, eight".