42239218 has 8 divisors (see below), whose sum is σ = 72410112. Its totient is φ = 18102516.

The previous prime is 42239207. The next prime is 42239227. The reversal of 42239218 is 81293224.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42239218.

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, 1508530 + ... + 1508557.

It is an arithmetic number, because the mean of its divisors is an integer number (9051264).

Almost surely, 2^42239218 is an apocalyptic number.

42239218 is a deficient number, since it is larger than the sum of its proper divisors (30170894).

42239218 is a wasteful number, since it uses less digits than its factorization.

42239218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017096.

The product of its digits is 6912, while the sum is 31.

The square root of 42239218 is about 6499.1705624641. The cubic root of 42239218 is about 348.2613584697.

The spelling of 42239218 in words is "forty-two million, two hundred thirty-nine thousand, two hundred eighteen".