386618818 has 4 divisors (see below), whose sum is σ = 579928230. Its totient is φ = 193309408.

The previous prime is 386618797. The next prime is 386618831. The reversal of 386618818 is 818816683.

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., 383258929 + 3359889 = 19577^2 + 1833^2 .

It is a super-2 number, since 2×386618818² = 298948220863434248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96654703 + ... + 96654706.

Almost surely, 2^386618818 is an apocalyptic number.

386618818 is a deficient number, since it is larger than the sum of its proper divisors (193309412).

386618818 is a wasteful number, since it uses less digits than its factorization.

386618818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193309411.

The product of its digits is 442368, while the sum is 49.

The square root of 386618818 is about 19662.6249010655. The cubic root of 386618818 is about 728.4968243010.

The spelling of 386618818 in words is "three hundred eighty-six million, six hundred eighteen thousand, eight hundred eighteen".