172320670 has 32 divisors (see below), whose sum is σ = 329313600. Its totient is φ = 64697856.

The previous prime is 172320647. The next prime is 172320677. The reversal of 172320670 is 76023271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172320677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73476 + ... + 75784.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^172320670 is an apocalyptic number.

172320670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172320670 is a deficient number, since it is larger than the sum of its proper divisors (156992930).

172320670 is a wasteful number, since it uses less digits than its factorization.

172320670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 172320670 is about 13127.0967848950. The cubic root of 172320670 is about 556.4751708842.

The spelling of 172320670 in words is "one hundred seventy-two million, three hundred twenty thousand, six hundred seventy".