3680218 has 4 divisors (see below), whose sum is σ = 5520330. Its totient is φ = 1840108.

The previous prime is 3680213. The next prime is 3680249. The reversal of 3680218 is 8120863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8120863 = 23 ⋅353081.

It can be written as a sum of positive squares in only one way, i.e., 3674889 + 5329 = 1917^2 + 73^2 .

It is not an unprimeable number, because it can be changed into a prime (3680213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920053 + ... + 920056.

Almost surely, 2^3680218 is an apocalyptic number.

3680218 is a deficient number, since it is larger than the sum of its proper divisors (1840112).

3680218 is a wasteful number, since it uses less digits than its factorization.

3680218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840111.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 3680218 is about 1918.3894286614. The cubic root of 3680218 is about 154.3919011475.

The spelling of 3680218 in words is "three million, six hundred eighty thousand, two hundred eighteen".