1212959568 has 80 divisors (see below), whose sum is σ = 3346214400. Its totient is φ = 377771520.

The previous prime is 1212959543. The next prime is 1212959569. The reversal of 1212959568 is 8659592121.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212959569) 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 15 ways as a sum of consecutive naturals, for example, 29098 + ... + 57206.

It is an arithmetic number, because the mean of its divisors is an integer number (41827680).

Almost surely, 2^1212959568 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 1212959568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673107200).

1212959568 is an abundant number, since it is smaller than the sum of its proper divisors (2133254832).

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

1212959568 is a wasteful number, since it uses less digits than its factorization.

1212959568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28180 (or 28174 counting only the distinct ones).

The product of its digits is 388800, while the sum is 48.

The square root of 1212959568 is about 34827.5690796817. The cubic root of 1212959568 is about 1066.4703234096.

The spelling of 1212959568 in words is "one billion, two hundred twelve million, nine hundred fifty-nine thousand, five hundred sixty-eight".