3855818 has 4 divisors (see below), whose sum is σ = 5783730. Its totient is φ = 1927908.

The previous prime is 3855799. The next prime is 3855829. The reversal of 3855818 is 8185583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8185583 = 7 ⋅1169369.

It can be written as a sum of positive squares in only one way, i.e., 3659569 + 196249 = 1913^2 + 443^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963953 + ... + 963956.

Almost surely, 2^3855818 is an apocalyptic number.

3855818 is a deficient number, since it is larger than the sum of its proper divisors (1927912).

3855818 is a wasteful number, since it uses less digits than its factorization.

3855818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927911.

The product of its digits is 38400, while the sum is 38.

The square root of 3855818 is about 1963.6236910365. The cubic root of 3855818 is about 156.8094297484.

The spelling of 3855818 in words is "three million, eight hundred fifty-five thousand, eight hundred eighteen".