172668424 has 16 divisors (see below), whose sum is σ = 323978220. Its totient is φ = 86274240.

The previous prime is 172668421. The next prime is 172668437. The reversal of 172668424 is 424866271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 168740100 + 3928324 = 12990^2 + 1982^2 .

It is a super-3 number, since 3×172668424³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (172668421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6214 + ... + 19594.

Almost surely, 2^172668424 is an apocalyptic number.

It is an amenable number.

172668424 is a deficient number, since it is larger than the sum of its proper divisors (151309796).

172668424 is a wasteful number, since it uses less digits than its factorization.

172668424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15000 (or 14996 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 172668424 is about 13140.3357643555. The cubic root of 172668424 is about 556.8492533747.

The spelling of 172668424 in words is "one hundred seventy-two million, six hundred sixty-eight thousand, four hundred twenty-four".