172755428 has 24 divisors (see below), whose sum is σ = 321280344. Its totient is φ = 80998400.

The previous prime is 172755419. The next prime is 172755431. The reversal of 172755428 is 824557271.

It can be written as a sum of positive squares in 4 ways, for example, as 119290084 + 53465344 = 10922^2 + 7312^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14588 + ... + 23628.

It is an arithmetic number, because the mean of its divisors is an integer number (13386681).

Almost surely, 2^172755428 is an apocalyptic number.

It is an amenable number.

172755428 is a deficient number, since it is larger than the sum of its proper divisors (148524916).

172755428 is a wasteful number, since it uses less digits than its factorization.

172755428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343 (or 9341 counting only the distinct ones).

The product of its digits is 156800, while the sum is 41.

The square root of 172755428 is about 13143.6459173245. The cubic root of 172755428 is about 556.9427658928.

The spelling of 172755428 in words is "one hundred seventy-two million, seven hundred fifty-five thousand, four hundred twenty-eight".