396818 has 4 divisors (see below), whose sum is σ = 595230. Its totient is φ = 198408.

The previous prime is 396733. The next prime is 396833. The reversal of 396818 is 818693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818693 = 47 ⋅17419.

It can be written as a sum of positive squares in only one way, i.e., 380689 + 16129 = 617^2 + 127^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99203 + ... + 99206.

2³⁹⁶⁸¹⁸ is an apocalyptic number.

396818 is a deficient number, since it is larger than the sum of its proper divisors (198412).

396818 is a wasteful number, since it uses less digits than its factorization.

396818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198411.

The product of its digits is 10368, while the sum is 35.

The square root of 396818 is about 629.9349172732. The cubic root of 396818 is about 73.4847331272.

Subtracting 396818 from its reverse (818693), we obtain a cube (421875 = 75³).

The spelling of 396818 in words is "three hundred ninety-six thousand, eight hundred eighteen".