228136168 has 32 divisors (see below), whose sum is σ = 469362600. Its totient is φ = 103304448.

The previous prime is 228136163. The next prime is 228136189. The reversal of 228136168 is 861631822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 198302724 + 29833444 = 14082^2 + 5462^2 .

It is a super-2 number, since 2×228136168² = 104092222299448448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228136163) by changing a digit.

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, 15183 + ... + 26206.

Almost surely, 2^228136168 is an apocalyptic number.

It is an amenable number.

228136168 is an abundant number, since it is smaller than the sum of its proper divisors (241226432).

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

228136168 is a wasteful number, since it uses less digits than its factorization.

228136168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41461 (or 41457 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 228136168 is about 15104.1771705711. The cubic root of 228136168 is about 611.0330680528.

The spelling of 228136168 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, one hundred sixty-eight".