618386 has 4 divisors (see below), whose sum is σ = 927582. Its totient is φ = 309192.

The previous prime is 618377. The next prime is 618407. The reversal of 618386 is 683816.

618386 is nontrivially palindromic in base 8.

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., 383161 + 235225 = 619^2 + 485^2 .

It is an unprimeable number.

618386 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 154595 + ... + 154598.

2⁶¹⁸³⁸⁶ is an apocalyptic number.

618386 is a deficient number, since it is larger than the sum of its proper divisors (309196).

618386 is a wasteful number, since it uses less digits than its factorization.

618386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309195.

The product of its digits is 6912, while the sum is 32.

The square root of 618386 is about 786.3752285010. The cubic root of 618386 is about 85.1961330138.

The spelling of 618386 in words is "six hundred eighteen thousand, three hundred eighty-six".