1206139568 has 60 divisors (see below), whose sum is σ = 2467565280. Its totient is φ = 570856320.

The previous prime is 1206139567. The next prime is 1206139577. The reversal of 1206139568 is 8659316021.

It is not an unprimeable number, because it can be changed into a prime (1206139567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 721838 + ... + 723506.

It is an arithmetic number, because the mean of its divisors is an integer number (41126088).

Almost surely, 2^1206139568 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 1206139568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233782640).

1206139568 is an abundant number, since it is smaller than the sum of its proper divisors (1261425712).

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

1206139568 is a wasteful number, since it uses less digits than its factorization.

1206139568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1206139568 is about 34729.5201233763. The cubic root of 1206139568 is about 1064.4677828917.

The spelling of 1206139568 in words is "one billion, two hundred six million, one hundred thirty-nine thousand, five hundred sixty-eight".