438218242 has 32 divisors (see below), whose sum is σ = 862663680. Its totient is φ = 161747280.

The previous prime is 438218239. The next prime is 438218251. The reversal of 438218242 is 242812834.

It is a junction number, because it is equal to n+sod(n) for n = 438218198 and 438218207.

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 15 ways as a sum of consecutive naturals, for example, 71958 + ... + 77809.

It is an arithmetic number, because the mean of its divisors is an integer number (26958240).

Almost surely, 2^438218242 is an apocalyptic number.

438218242 is a deficient number, since it is larger than the sum of its proper divisors (424445438).

438218242 is a wasteful number, since it uses less digits than its factorization.

438218242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149806.

The product of its digits is 24576, while the sum is 34.

The square root of 438218242 is about 20933.6628901872. The cubic root of 438218242 is about 759.5624455037.

The spelling of 438218242 in words is "four hundred thirty-eight million, two hundred eighteen thousand, two hundred forty-two".