228442287 has 16 divisors (see below), whose sum is σ = 310272768. Its totient is φ = 149472960.

The previous prime is 228442271. The next prime is 228442321. The reversal of 228442287 is 782244822.

It is not a de Polignac number, because 228442287 - 2⁴ = 228442271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228442217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47328 + ... + 51930.

It is an arithmetic number, because the mean of its divisors is an integer number (19392048).

Almost surely, 2^228442287 is an apocalyptic number.

228442287 is a deficient number, since it is larger than the sum of its proper divisors (81830481).

228442287 is a wasteful number, since it uses less digits than its factorization.

228442287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910.

The product of its digits is 114688, while the sum is 39.

The square root of 228442287 is about 15114.3073609081. The cubic root of 228442287 is about 611.3062458854.

The spelling of 228442287 in words is "two hundred twenty-eight million, four hundred forty-two thousand, two hundred eighty-seven".