168738228 has 36 divisors (see below), whose sum is σ = 442332800. Its totient is φ = 56245752.

The previous prime is 168738223. The next prime is 168738263. The reversal of 168738228 is 822837861.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168738223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85828 + ... + 87771.

Almost surely, 2^168738228 is an apocalyptic number.

168738228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168738228 is an abundant number, since it is smaller than the sum of its proper divisors (273594572).

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

168738228 is a wasteful number, since it uses less digits than its factorization.

168738228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173618 (or 173604 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 168738228 is about 12989.9279443729. The cubic root of 168738228 is about 552.5918745954.

The spelling of 168738228 in words is "one hundred sixty-eight million, seven hundred thirty-eight thousand, two hundred twenty-eight".