3821866 has 8 divisors (see below), whose sum is σ = 5917824. Its totient is φ = 1849260.

The previous prime is 3821863. The next prime is 3821893. The reversal of 3821866 is 6681283.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3821863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30760 + ... + 30883.

It is an arithmetic number, because the mean of its divisors is an integer number (739728).

Almost surely, 2^3821866 is an apocalyptic number.

3821866 is a deficient number, since it is larger than the sum of its proper divisors (2095958).

3821866 is a wasteful number, since it uses less digits than its factorization.

3821866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61676.

The product of its digits is 13824, while the sum is 34.

The square root of 3821866 is about 1954.9593346154. The cubic root of 3821866 is about 156.3478158724.

It can be divided in two parts, 38 and 21866, that added together give a square (21904 = 148²).

The spelling of 3821866 in words is "three million, eight hundred twenty-one thousand, eight hundred sixty-six".