168223872 has 64 divisors (see below), whose sum is σ = 470383200. Its totient is φ = 53121024.

The previous prime is 168223829. The next prime is 168223873. The reversal of 168223872 is 278322861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×168223872² = 56598542221344768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168223872.

It is not an unprimeable number, because it can be changed into a prime (168223873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4233 + ... + 18824.

Almost surely, 2^168223872 is an apocalyptic number.

168223872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168223872 is an abundant number, since it is smaller than the sum of its proper divisors (302159328).

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

168223872 is a wasteful number, since it uses less digits than its factorization.

168223872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23093 (or 23081 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 168223872 is about 12970.1145715834. The cubic root of 168223872 is about 552.0298240555.

The spelling of 168223872 in words is "one hundred sixty-eight million, two hundred twenty-three thousand, eight hundred seventy-two".