168238646 has 4 divisors (see below), whose sum is σ = 252357972. Its totient is φ = 84119322.

The previous prime is 168238633. The next prime is 168238663. The reversal of 168238646 is 646832861.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 168238597 and 168238606.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42059660 + ... + 42059663.

It is an arithmetic number, because the mean of its divisors is an integer number (63089493).

Almost surely, 2^168238646 is an apocalyptic number.

168238646 is a deficient number, since it is larger than the sum of its proper divisors (84119326).

168238646 is an equidigital number, since it uses as much as digits as its factorization.

168238646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84119325.

The product of its digits is 331776, while the sum is 44.

The square root of 168238646 is about 12970.6840991522. The cubic root of 168238646 is about 552.0459839694.

The spelling of 168238646 in words is "one hundred sixty-eight million, two hundred thirty-eight thousand, six hundred forty-six".