172223680 has 28 divisors (see below), whose sum is σ = 410108400. Its totient is φ = 68889344.

The previous prime is 172223677. The next prime is 172223687. The reversal of 172223680 is 86322271.

It is not an unprimeable number, because it can be changed into a prime (172223687) 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, 268780 + ... + 269419.

Almost surely, 2^172223680 is an apocalyptic number.

172223680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172223680 is an abundant number, since it is smaller than the sum of its proper divisors (237884720).

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

172223680 is an equidigital number, since it uses as much as digits as its factorization.

172223680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538216 (or 538206 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 172223680 is about 13123.4019979577. The cubic root of 172223680 is about 556.3707480156.

It can be divided in two parts, 17222 and 3680, that added together give a palindrome (20902).

The spelling of 172223680 in words is "one hundred seventy-two million, two hundred twenty-three thousand, six hundred eighty".