42438586 has 4 divisors (see below), whose sum is σ = 63657882. Its totient is φ = 21219292.

The previous prime is 42438581. The next prime is 42438601. The reversal of 42438586 is 68583424.

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., 22857961 + 19580625 = 4781^2 + 4425^2 .

It is not an unprimeable number, because it can be changed into a prime (42438581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10609645 + ... + 10609648.

Almost surely, 2^42438586 is an apocalyptic number.

42438586 is a deficient number, since it is larger than the sum of its proper divisors (21219296).

42438586 is a wasteful number, since it uses less digits than its factorization.

42438586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21219295.

The product of its digits is 184320, while the sum is 40.

The square root of 42438586 is about 6514.4904635743. The cubic root of 42438586 is about 348.8084268105.

The spelling of 42438586 in words is "forty-two million, four hundred thirty-eight thousand, five hundred eighty-six".