3821406 has 32 divisors (see below), whose sum is σ = 7954848. Its totient is φ = 1223040.

The previous prime is 3821399. The next prime is 3821407. The reversal of 3821406 is 6041283.

3821406 = 14² + 15² + ... + 225².

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19300 + ... + 19496.

It is an arithmetic number, because the mean of its divisors is an integer number (248589).

Almost surely, 2^3821406 is an apocalyptic number.

3821406 is an abundant number, since it is smaller than the sum of its proper divisors (4133442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3821406 is a wasteful number, since it uses less digits than its factorization.

3821406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 3821406 is about 1954.8416815691. The cubic root of 3821406 is about 156.3415429435.

Adding to 3821406 its reverse (6041283), we get a palindrome (9862689).

The spelling of 3821406 in words is "three million, eight hundred twenty-one thousand, four hundred six".