172573320 has 64 divisors (see below), whose sum is σ = 518958720. Its totient is φ = 45909504.

The previous prime is 172573267. The next prime is 172573321. The reversal of 172573320 is 23375271.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (172573321) 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, 56964 + ... + 59916.

It is an arithmetic number, because the mean of its divisors is an integer number (8108730).

Almost surely, 2^172573320 is an apocalyptic number.

172573320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172573320 is an abundant number, since it is smaller than the sum of its proper divisors (346385400).

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

172573320 is a wasteful number, since it uses less digits than its factorization.

172573320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454 (or 3450 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 172573320 is about 13136.7164847233. The cubic root of 172573320 is about 556.7469989764.

The spelling of 172573320 in words is "one hundred seventy-two million, five hundred seventy-three thousand, three hundred twenty".