1199947812 has 192 divisors, whose sum is σ = 3561492480. Its totient is φ = 306561024.

The previous prime is 1199947811. The next prime is 1199947829. The reversal of 1199947812 is 2187499911.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1199947811) 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 63 ways as a sum of consecutive naturals, for example, 3560508 + ... + 3560844.

It is an arithmetic number, because the mean of its divisors is an integer number (18549440).

Almost surely, 2^1199947812 is an apocalyptic number.

1199947812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1199947812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1780746240).

1199947812 is an abundant number, since it is smaller than the sum of its proper divisors (2361544668).

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

1199947812 is a wasteful number, since it uses less digits than its factorization.

1199947812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its digits is 326592, while the sum is 51.

The square root of 1199947812 is about 34640.2628742912. The cubic root of 1199947812 is about 1062.6431639522.

The spelling of 1199947812 in words is "one billion, one hundred ninety-nine million, nine hundred forty-seven thousand, eight hundred twelve".