305895138 has 8 divisors (see below), whose sum is σ = 611790288. Its totient is φ = 101965044.

The previous prime is 305895119. The next prime is 305895151. The reversal of 305895138 is 831598503.

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

305895138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 305895138.

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, 25491256 + ... + 25491267.

It is an arithmetic number, because the mean of its divisors is an integer number (76473786).

Almost surely, 2^305895138 is an apocalyptic number.

305895138 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.

305895138 is a wasteful number, since it uses less digits than its factorization.

305895138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50982528.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 305895138 is about 17489.8581469376. The cubic root of 305895138 is about 673.7894263629.

The spelling of 305895138 in words is "three hundred five million, eight hundred ninety-five thousand, one hundred thirty-eight".