172964720 has 20 divisors (see below), whose sum is σ = 402143160. Its totient is φ = 69185856.

The previous prime is 172964711. The next prime is 172964723. The reversal of 172964720 is 27469271.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172964723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080950 + ... + 1081109.

It is an arithmetic number, because the mean of its divisors is an integer number (20107158).

Almost surely, 2^172964720 is an apocalyptic number.

172964720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172964720 is an abundant number, since it is smaller than the sum of its proper divisors (229178440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172964720 is a wasteful number, since it uses less digits than its factorization.

172964720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162072 (or 2162066 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 172964720 is about 13151.6052252187. The cubic root of 172964720 is about 557.1675858909.

The spelling of 172964720 in words is "one hundred seventy-two million, nine hundred sixty-four thousand, seven hundred twenty".