172275128 has 32 divisors (see below), whose sum is σ = 340752000. Its totient is φ = 81427680.

The previous prime is 172275107. The next prime is 172275137. The reversal of 172275128 is 821572271.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 93173 + ... + 95003.

It is an arithmetic number, because the mean of its divisors is an integer number (10648500).

Almost surely, 2^172275128 is an apocalyptic number.

It is an amenable number.

172275128 is a deficient number, since it is larger than the sum of its proper divisors (168476872).

172275128 is a wasteful number, since it uses less digits than its factorization.

172275128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2471 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 172275128 is about 13125.3620140551. The cubic root of 172275128 is about 556.4261436353.

The spelling of 172275128 in words is "one hundred seventy-two million, two hundred seventy-five thousand, one hundred twenty-eight".