1212808648 has 8 divisors (see below), whose sum is σ = 2274016230. Its totient is φ = 606404320.

The previous prime is 1212808643. The next prime is 1212808651. The reversal of 1212808648 is 8468082121.

It can be written as a sum of positive squares in only one way, i.e., 1212293124 + 515524 = 34818^2 + 718^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1212808648.

It is not an unprimeable number, because it can be changed into a prime (1212808643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75800533 + ... + 75800548.

Almost surely, 2^1212808648 is an apocalyptic number.

It is an amenable number.

1212808648 is a deficient number, since it is larger than the sum of its proper divisors (1061207582).

1212808648 is a wasteful number, since it uses less digits than its factorization.

1212808648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151601087 (or 151601083 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 1212808648 is about 34825.4023379487. The cubic root of 1212808648 is about 1066.4260904493.

The spelling of 1212808648 in words is "one billion, two hundred twelve million, eight hundred eight thousand, six hundred forty-eight".