168536738 has 8 divisors (see below), whose sum is σ = 253015488. Its totient is φ = 84198244.

The previous prime is 168536647. The next prime is 168536743. The reversal of 168536738 is 837635861.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 168536692 and 168536701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32006 + ... + 36897.

It is an arithmetic number, because the mean of its divisors is an integer number (31626936).

Almost surely, 2^168536738 is an apocalyptic number.

168536738 is a deficient number, since it is larger than the sum of its proper divisors (84478750).

168536738 is a wasteful number, since it uses less digits than its factorization.

168536738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70128.

The product of its digits is 725760, while the sum is 47.

The square root of 168536738 is about 12982.1700035087. The cubic root of 168536738 is about 552.3718373515.

The spelling of 168536738 in words is "one hundred sixty-eight million, five hundred thirty-six thousand, seven hundred thirty-eight".