1199345856 has 112 divisors (see below), whose sum is σ = 3418441728. Its totient is φ = 370022400.

The previous prime is 1199345843. The next prime is 1199345863. The reversal of 1199345856 is 6585439911.

It is a junction number, because it is equal to n+sod(n) for n = 1199345799 and 1199345808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132516 + ... + 141276.

Almost surely, 2^1199345856 is an apocalyptic number.

1199345856 is a gapful number since it is divisible by the number (16) 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 1199345856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709220864).

1199345856 is an abundant number, since it is smaller than the sum of its proper divisors (2219095872).

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

1199345856 is a wasteful number, since it uses less digits than its factorization.

1199345856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830 (or 8820 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 51.

The square root of 1199345856 is about 34631.5731089421. The cubic root of 1199345856 is about 1062.4654419394.

The spelling of 1199345856 in words is "one billion, one hundred ninety-nine million, three hundred forty-five thousand, eight hundred fifty-six".