168402442 has 16 divisors (see below), whose sum is σ = 288037512. Its totient is φ = 73152000.

The previous prime is 168402433. The next prime is 168402467. The reversal of 168402442 is 244204861.

It can be written as a sum of positive squares in 4 ways, for example, as 121903681 + 46498761 = 11041^2 + 6819^2 .

It is an unprimeable number.

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, 190059 + ... + 190942.

Almost surely, 2^168402442 is an apocalyptic number.

168402442 is a deficient number, since it is larger than the sum of its proper divisors (119635070).

168402442 is a wasteful number, since it uses less digits than its factorization.

168402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381033.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 168402442 is about 12976.9966479151. The cubic root of 168402442 is about 552.2250819293.

The spelling of 168402442 in words is "one hundred sixty-eight million, four hundred two thousand, four hundred forty-two".