168228442 has 8 divisors (see below), whose sum is σ = 252403956. Its totient is φ = 84093792.

The previous prime is 168228439. The next prime is 168228443. The reversal of 168228442 is 244822861.

168228442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163558521 + 4669921 = 12789^2 + 2161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (168228443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4078 + ... + 18790.

Almost surely, 2^168228442 is an apocalyptic number.

168228442 is a deficient number, since it is larger than the sum of its proper divisors (84175514).

168228442 is a wasteful number, since it uses less digits than its factorization.

168228442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20432.

The product of its digits is 49152, while the sum is 37.

The square root of 168228442 is about 12970.2907446210. The cubic root of 168228442 is about 552.0348228574.

The spelling of 168228442 in words is "one hundred sixty-eight million, two hundred twenty-eight thousand, four hundred forty-two".