3821018 has 4 divisors (see below), whose sum is σ = 5731530. Its totient is φ = 1910508.

The previous prime is 3821009. The next prime is 3821057. The reversal of 3821018 is 8101283.

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., 2745649 + 1075369 = 1657^2 + 1037^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3820984 and 3821002.

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, 955253 + ... + 955256.

Almost surely, 2^3821018 is an apocalyptic number.

3821018 is a deficient number, since it is larger than the sum of its proper divisors (1910512).

3821018 is a wasteful number, since it uses less digits than its factorization.

3821018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910511.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 3821018 is about 1954.7424382767. The cubic root of 3821018 is about 156.3362514729.

The spelling of 3821018 in words is "three million, eight hundred twenty-one thousand, eighteen".