305138166 has 8 divisors (see below), whose sum is σ = 610276344. Its totient is φ = 101712720.

The previous prime is 305138161. The next prime is 305138173. The reversal of 305138166 is 661831503.

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

305138166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305138161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25428175 + ... + 25428186.

It is an arithmetic number, because the mean of its divisors is an integer number (76284543).

Almost surely, 2^305138166 is an apocalyptic number.

305138166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

305138166 is a wasteful number, since it uses less digits than its factorization.

305138166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50856366.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 305138166 is about 17468.2044297632. The cubic root of 305138166 is about 673.2331779818.

Adding to 305138166 its reverse (661831503), we get a palindrome (966969669).

The spelling of 305138166 in words is "three hundred five million, one hundred thirty-eight thousand, one hundred sixty-six".