57438218 has 4 divisors (see below), whose sum is σ = 86157330. Its totient is φ = 28719108.

The previous prime is 57438187. The next prime is 57438233. The reversal of 57438218 is 81283475.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40157569 + 17280649 = 6337^2 + 4157^2 .

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 as a sum of consecutive naturals, namely, 14359553 + ... + 14359556.

Almost surely, 2^57438218 is an apocalyptic number.

57438218 is a deficient number, since it is larger than the sum of its proper divisors (28719112).

57438218 is a wasteful number, since it uses less digits than its factorization.

57438218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28719111.

The product of its digits is 53760, while the sum is 38.

The square root of 57438218 is about 7578.8005647332. The cubic root of 57438218 is about 385.8338434914.

The spelling of 57438218 in words is "fifty-seven million, four hundred thirty-eight thousand, two hundred eighteen".