304842138 has 16 divisors (see below), whose sum is σ = 636192576. Its totient is φ = 97196000.

The previous prime is 304842133. The next prime is 304842143. The reversal of 304842138 is 831248403.

304842138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (304842133) and next prime (304842143).

It is a super-2 number, since 2×304842138² = 185857458200822088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304842099 and 304842108.

It is not an unprimeable number, because it can be changed into a prime (304842133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1104363 + ... + 1104638.

It is an arithmetic number, because the mean of its divisors is an integer number (39762036).

Almost surely, 2^304842138 is an apocalyptic number.

304842138 is an abundant number, since it is smaller than the sum of its proper divisors (331350438).

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

304842138 is a wasteful number, since it uses less digits than its factorization.

304842138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209029.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 304842138 is about 17459.7290356981. The cubic root of 304842138 is about 673.0153964686.

It can be divided in two parts, 304842 and 138, that multiplied together give a square (42068196 = 6486²).

The spelling of 304842138 in words is "three hundred four million, eight hundred forty-two thousand, one hundred thirty-eight".