42618386 has 4 divisors (see below), whose sum is σ = 63927582. Its totient is φ = 21309192.

The previous prime is 42618353. The next prime is 42618419. The reversal of 42618386 is 68381624.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (42618353) and next prime (42618419).

It can be written as a sum of positive squares in only one way, i.e., 32890225 + 9728161 = 5735^2 + 3119^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10654595 + ... + 10654598.

Almost surely, 2^42618386 is an apocalyptic number.

42618386 is a deficient number, since it is larger than the sum of its proper divisors (21309196).

42618386 is a wasteful number, since it uses less digits than its factorization.

42618386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21309195.

The product of its digits is 55296, while the sum is 38.

The square root of 42618386 is about 6528.2758826508. The cubic root of 42618386 is about 349.3003328754.

The spelling of 42618386 in words is "forty-two million, six hundred eighteen thousand, three hundred eighty-six".