1200881844 has 144 divisors (see below), whose sum is σ = 3245598720. Its totient is φ = 373800960.

The previous prime is 1200881839. The next prime is 1200881867. The reversal of 1200881844 is 4481880021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1200881799 and 1200881808.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 4672564 + ... + 4672820.

It is an arithmetic number, because the mean of its divisors is an integer number (22538880).

Almost surely, 2^1200881844 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 1200881844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622799360).

1200881844 is an abundant number, since it is smaller than the sum of its proper divisors (2044716876).

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

1200881844 is a wasteful number, since it uses less digits than its factorization.

1200881844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 1200881844 is about 34653.7421355905. The cubic root of 1200881844 is about 1062.9188107460.

The spelling of 1200881844 in words is "one billion, two hundred million, eight hundred eighty-one thousand, eight hundred forty-four".