168505386 has 16 divisors (see below), whose sum is σ = 385155264. Its totient is φ = 48144384.

The previous prime is 168505369. The next prime is 168505397. The reversal of 168505386 is 683505861.

It is a super-2 number, since 2×168505386² = 56788130222017992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 4012033 = 168505386 / (1 + 6 + 8 + 5 + 0 + 5 + 3 + 8 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005975 + ... + 2006058.

It is an arithmetic number, because the mean of its divisors is an integer number (24072204).

Almost surely, 2^168505386 is an apocalyptic number.

168505386 is an abundant number, since it is smaller than the sum of its proper divisors (216649878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168505386 is a wasteful number, since it uses less digits than its factorization.

168505386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012045.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 168505386 is about 12980.9624450578. The cubic root of 168505386 is about 552.3375836214.

The spelling of 168505386 in words is "one hundred sixty-eight million, five hundred five thousand, three hundred eighty-six".