228144861 has 12 divisors (see below), whose sum is σ = 376620192. Its totient is φ = 130368456.

The previous prime is 228144857. The next prime is 228144871. The reversal of 228144861 is 168441822.

It is not a de Polignac number, because 228144861 - 2² = 228144857 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228144871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1810611 + ... + 1810736.

It is an arithmetic number, because the mean of its divisors is an integer number (31385016).

Almost surely, 2^228144861 is an apocalyptic number.

228144861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228144861 is a deficient number, since it is larger than the sum of its proper divisors (148475331).

228144861 is a wasteful number, since it uses less digits than its factorization.

228144861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621360 (or 3621357 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 228144861 is about 15104.4649359055. The cubic root of 228144861 is about 611.0408289777.

The spelling of 228144861 in words is "two hundred twenty-eight million, one hundred forty-four thousand, eight hundred sixty-one".