1020332644 has 12 divisors (see below), whose sum is σ = 1786019004. Its totient is φ = 510041504.

The previous prime is 1020332641. The next prime is 1020332671. The reversal of 1020332644 is 4462330201.

It can be written as a sum of positive squares in 2 ways, for example, as 735060544 + 285272100 = 27112^2 + 16890^2 .

It is not an unprimeable number, because it can be changed into a prime (1020332641) 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 in 3 ways as a sum of consecutive naturals, for example, 11419 + ... + 46594.

It is an arithmetic number, because the mean of its divisors is an integer number (148834917).

Almost surely, 2^1020332644 is an apocalyptic number.

It is an amenable number.

1020332644 is a deficient number, since it is larger than the sum of its proper divisors (765686360).

1020332644 is a wasteful number, since it uses less digits than its factorization.

1020332644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62414 (or 62412 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1020332644 is about 31942.6461646495. The cubic root of 1020332644 is about 1006.7321247924.

Adding to 1020332644 its reverse (4462330201), we get a palindrome (5482662845).

The spelling of 1020332644 in words is "one billion, twenty million, three hundred thirty-two thousand, six hundred forty-four".