168642308 has 24 divisors (see below), whose sum is σ = 310318680. Its totient is φ = 80075520.

The previous prime is 168642301. The next prime is 168642317. The reversal of 168642308 is 803246861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16662724 + 151979584 = 4082^2 + 12328^2 .

It is not an unprimeable number, because it can be changed into a prime (168642301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4841 + ... + 18992.

It is an arithmetic number, because the mean of its divisors is an integer number (12929945).

Almost surely, 2^168642308 is an apocalyptic number.

It is an amenable number.

168642308 is a deficient number, since it is larger than the sum of its proper divisors (141676372).

168642308 is a wasteful number, since it uses less digits than its factorization.

168642308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23927 (or 23925 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 168642308 is about 12986.2353282235. The cubic root of 168642308 is about 552.4871469748.

The spelling of 168642308 in words is "one hundred sixty-eight million, six hundred forty-two thousand, three hundred eight".