172447144 has 8 divisors (see below), whose sum is σ = 323338410. Its totient is φ = 86223568.

The previous prime is 172447129. The next prime is 172447151. The reversal of 172447144 is 441744271.

It can be written as a sum of positive squares in only one way, i.e., 97416900 + 75030244 = 9870^2 + 8662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 10777939 + ... + 10777954.

Almost surely, 2^172447144 is an apocalyptic number.

It is an amenable number.

172447144 is a deficient number, since it is larger than the sum of its proper divisors (150891266).

172447144 is a wasteful number, since it uses less digits than its factorization.

172447144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21555899 (or 21555895 counting only the distinct ones).

The product of its digits is 25088, while the sum is 34.

The square root of 172447144 is about 13131.9131888693. The cubic root of 172447144 is about 556.6112784282.

The spelling of 172447144 in words is "one hundred seventy-two million, four hundred forty-seven thousand, one hundred forty-four".