228609186 has 16 divisors (see below), whose sum is σ = 492389184. Its totient is φ = 70341264.

The previous prime is 228609181. The next prime is 228609211. The reversal of 228609186 is 681906822.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228609181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465366 + ... + 1465521.

It is an arithmetic number, because the mean of its divisors is an integer number (30774324).

Almost surely, 2^228609186 is an apocalyptic number.

228609186 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228609186 is an abundant number, since it is smaller than the sum of its proper divisors (263779998).

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

228609186 is a wasteful number, since it uses less digits than its factorization.

228609186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930905.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 228609186 is about 15119.8275783820. The cubic root of 228609186 is about 611.4550822587.

The spelling of 228609186 in words is "two hundred twenty-eight million, six hundred nine thousand, one hundred eighty-six".