305872136 has 16 divisors (see below), whose sum is σ = 587498940. Its totient is φ = 149205760.

The previous prime is 305872123. The next prime is 305872159. The reversal of 305872136 is 631278503.

It can be written as a sum of positive squares in 2 ways, for example, as 195832036 + 110040100 = 13994^2 + 10490^2 .

It is a junction number, because it is equal to n+sod(n) for n = 305872096 and 305872105.

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 in 3 ways as a sum of consecutive naturals, for example, 465941 + ... + 466596.

Almost surely, 2^305872136 is an apocalyptic number.

It is an amenable number.

305872136 is a deficient number, since it is larger than the sum of its proper divisors (281626804).

305872136 is a wasteful number, since it uses less digits than its factorization.

305872136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932584 (or 932580 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 305872136 is about 17489.2005534844. The cubic root of 305872136 is about 673.7725372497.

It can be divided in two parts, 30587 and 2136, that added together give a palindrome (32723).

The spelling of 305872136 in words is "three hundred five million, eight hundred seventy-two thousand, one hundred thirty-six".