1200566388 has 96 divisors (see below), whose sum is σ = 3367526400. Its totient is φ = 325653120.

The previous prime is 1200566371. The next prime is 1200566431. The reversal of 1200566388 is 8836650021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133663 + ... + 142361.

It is an arithmetic number, because the mean of its divisors is an integer number (35078400).

Almost surely, 2^1200566388 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 1200566388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683763200).

1200566388 is an abundant number, since it is smaller than the sum of its proper divisors (2166960012).

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

1200566388 is a wasteful number, since it uses less digits than its factorization.

1200566388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797 (or 8795 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1200566388 is about 34649.1902935696. The cubic root of 1200566388 is about 1062.8257309585.

The spelling of 1200566388 in words is "one billion, two hundred million, five hundred sixty-six thousand, three hundred eighty-eight".