1982472644 has 6 divisors (see below), whose sum is σ = 3469327134. Its totient is φ = 991236320.

The previous prime is 1982472641. The next prime is 1982472719. The reversal of 1982472644 is 4462742891.

It can be written as a sum of positive squares in only one way, i.e., 1790982400 + 191490244 = 42320^2 + 13838^2 .

It is not an unprimeable number, because it can be changed into a prime (1982472641) by changing a digit.

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 as a sum of consecutive naturals, namely, 247809077 + ... + 247809084.

It is an arithmetic number, because the mean of its divisors is an integer number (578221189).

Almost surely, 2^1982472644 is an apocalyptic number.

It is an amenable number.

1982472644 is a deficient number, since it is larger than the sum of its proper divisors (1486854490).

1982472644 is a wasteful number, since it uses less digits than its factorization.

1982472644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495618165 (or 495618163 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 1982472644 is about 44524.9665244119. The cubic root of 1982472644 is about 1256.2297314981.

The spelling of 1982472644 in words is "one billion, nine hundred eighty-two million, four hundred seventy-two thousand, six hundred forty-four".