1000172644 has 24 divisors (see below), whose sum is σ = 1760081400. Its totient is φ = 497301504.

The previous prime is 1000172587. The next prime is 1000172681. The reversal of 1000172644 is 4462710001.

It can be written as a sum of positive squares in 4 ways, for example, as 396487744 + 603684900 = 19912^2 + 24570^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669162 + ... + 670654.

It is an arithmetic number, because the mean of its divisors is an integer number (73336725).

Almost surely, 2^1000172644 is an apocalyptic number.

It is an amenable number.

1000172644 is a deficient number, since it is larger than the sum of its proper divisors (759908756).

1000172644 is a wasteful number, since it uses less digits than its factorization.

1000172644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1000172644 is about 31625.5062251974. The cubic root of 1000172644 is about 1000.0575446885.

Adding to 1000172644 its reverse (4462710001), we get a palindrome (5462882645).

The spelling of 1000172644 in words is "one billion, one hundred seventy-two thousand, six hundred forty-four".