1211798848 has 56 divisors (see below), whose sum is σ = 2606412872. Its totient is φ = 555669504.

The previous prime is 1211798827. The next prime is 1211798849. The reversal of 1211798848 is 8488971121.

It can be written as a sum of positive squares in 4 ways, for example, as 82301184 + 1129497664 = 9072^2 + 33608^2 .

It is a super-3 number, since 3×1211798848³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211798849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125986 + ... + 135262.

It is an arithmetic number, because the mean of its divisors is an integer number (46543087).

Almost surely, 2^1211798848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211798848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303206436).

1211798848 is an abundant number, since it is smaller than the sum of its proper divisors (1394614024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211798848 is a wasteful number, since it uses less digits than its factorization.

1211798848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9459 (or 9449 counting only the distinct ones).

The product of its digits is 258048, while the sum is 49.

The square root of 1211798848 is about 34810.9012810642. The cubic root of 1211798848 is about 1066.1300349311.

The spelling of 1211798848 in words is "one billion, two hundred eleven million, seven hundred ninety-eight thousand, eight hundred forty-eight".