172804224 has 32 divisors (see below), whose sum is σ = 459012240. Its totient is φ = 57601280.

The previous prime is 172804207. The next prime is 172804241. The reversal of 172804224 is 422408271.

It is an interprime number because it is at equal distance from previous prime (172804207) and next prime (172804241).

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×172804224² = 59722599664484352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172804191 and 172804200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224622 + ... + 225389.

Almost surely, 2^172804224 is an apocalyptic number.

It is an amenable number.

172804224 is an abundant number, since it is smaller than the sum of its proper divisors (286208016).

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

172804224 is an equidigital number, since it uses as much as digits as its factorization.

172804224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450028 (or 450016 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 172804224 is about 13145.5020444257. The cubic root of 172804224 is about 556.9951984390.

The spelling of 172804224 in words is "one hundred seventy-two million, eight hundred four thousand, two hundred twenty-four".