228001172 has 24 divisors (see below), whose sum is σ = 457712640. Its totient is φ = 97348320.

The previous prime is 228001157. The next prime is 228001181. The reversal of 228001172 is 271100822.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7604 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (19071360).

Almost surely, 2^228001172 is an apocalyptic number.

It is an amenable number.

228001172 is an abundant number, since it is smaller than the sum of its proper divisors (229711468).

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

228001172 is a wasteful number, since it uses less digits than its factorization.

228001172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30551 (or 30549 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 228001172 is about 15099.7076792897. The cubic root of 228001172 is about 610.9125211936.

Adding to 228001172 its reverse (271100822), we get a palindrome (499101994).

The spelling of 228001172 in words is "two hundred twenty-eight million, one thousand, one hundred seventy-two".