228187866 has 16 divisors (see below), whose sum is σ = 462153600. Its totient is φ = 75099648.

The previous prime is 228187859. The next prime is 228187873. The reversal of 228187866 is 668781822.

It is an interprime number because it is at equal distance from previous prime (228187859) and next prime (228187873).

It is a super-3 number, since 3×228187866³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240231 + ... + 241178.

It is an arithmetic number, because the mean of its divisors is an integer number (28884600).

Almost surely, 2^228187866 is an apocalyptic number.

228187866 is an abundant number, since it is smaller than the sum of its proper divisors (233965734).

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

228187866 is a wasteful number, since it uses less digits than its factorization.

228187866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481493.

The product of its digits is 516096, while the sum is 48.

The square root of 228187866 is about 15105.8884545067. Note that the first 3 decimals coincide. The cubic root of 228187866 is about 611.0792200242.

The spelling of 228187866 in words is "two hundred twenty-eight million, one hundred eighty-seven thousand, eight hundred sixty-six".