1985212244 has 6 divisors (see below), whose sum is σ = 3474121434. Its totient is φ = 992606120.

The previous prime is 1985212241. The next prime is 1985212249. The reversal of 1985212244 is 4422125891.

It can be written as a sum of positive squares in only one way, i.e., 1934944144 + 50268100 = 43988^2 + 7090^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1985212198 and 1985212207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985212241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248151527 + ... + 248151534.

It is an arithmetic number, because the mean of its divisors is an integer number (579020239).

Almost surely, 2^1985212244 is an apocalyptic number.

It is an amenable number.

1985212244 is a deficient number, since it is larger than the sum of its proper divisors (1488909190).

1985212244 is a wasteful number, since it uses less digits than its factorization.

1985212244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496303065 (or 496303063 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 1985212244 is about 44555.7206652524. The cubic root of 1985212244 is about 1256.8081308834.

The spelling of 1985212244 in words is "one billion, nine hundred eighty-five million, two hundred twelve thousand, two hundred forty-four".