1979200648 has 8 divisors (see below), whose sum is σ = 3711001230. Its totient is φ = 989600320.

The previous prime is 1979200627. The next prime is 1979200649. The reversal of 1979200648 is 8460029791.

It can be written as a sum of positive squares in only one way, i.e., 1964439684 + 14760964 = 44322^2 + 3842^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1979200598 and 1979200607.

It is not an unprimeable number, because it can be changed into a prime (1979200649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123700033 + ... + 123700048.

Almost surely, 2^1979200648 is an apocalyptic number.

It is an amenable number.

1979200648 is a deficient number, since it is larger than the sum of its proper divisors (1731800582).

1979200648 is a wasteful number, since it uses less digits than its factorization.

1979200648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247400087 (or 247400083 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1979200648 is about 44488.2079657070. The cubic root of 1979200648 is about 1255.5382310654.

The spelling of 1979200648 in words is "one billion, nine hundred seventy-nine million, two hundred thousand, six hundred forty-eight".