172417768 has 8 divisors (see below), whose sum is σ = 323283330. Its totient is φ = 86208880.

The previous prime is 172417759. The next prime is 172417769. The reversal of 172417768 is 867714271.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 43322724 = 11362^2 + 6582^2 .

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

It is not an unprimeable number, because it can be changed into a prime (172417769) 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, 10776103 + ... + 10776118.

Almost surely, 2^172417768 is an apocalyptic number.

It is an amenable number.

172417768 is a deficient number, since it is larger than the sum of its proper divisors (150865562).

172417768 is a wasteful number, since it uses less digits than its factorization.

172417768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21552227 (or 21552223 counting only the distinct ones).

The product of its digits is 131712, while the sum is 43.

The square root of 172417768 is about 13130.7946446512. The cubic root of 172417768 is about 556.5796707887.

The spelling of 172417768 in words is "one hundred seventy-two million, four hundred seventeen thousand, seven hundred sixty-eight".