42718218 has 32 divisors (see below), whose sum is σ = 89328960. Its totient is φ = 13601280.

The previous prime is 42718157. The next prime is 42718237. The reversal of 42718218 is 81281724.

It is a happy number.

42718218 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×42718218² = 3649692298191048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15613 + ... + 18143.

It is an arithmetic number, because the mean of its divisors is an integer number (2791530).

Almost surely, 2^42718218 is an apocalyptic number.

42718218 is an abundant number, since it is smaller than the sum of its proper divisors (46610742).

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

42718218 is a wasteful number, since it uses less digits than its factorization.

42718218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662.

The product of its digits is 7168, while the sum is 33.

The square root of 42718218 is about 6535.9175331395. The cubic root of 42718218 is about 349.5728612464.

The spelling of 42718218 in words is "forty-two million, seven hundred eighteen thousand, two hundred eighteen".