4381906 has 8 divisors (see below), whose sum is σ = 6583500. Its totient is φ = 2187408.

The previous prime is 4381879. The next prime is 4381921. The reversal of 4381906 is 6091834.

It can be written as a sum of positive squares in 2 ways, for example, as 4165681 + 216225 = 2041^2 + 465^2 .

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

It is a super-2 number, since 2×4381906² = 38402200385672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220 + ... + 2968.

Almost surely, 2^4381906 is an apocalyptic number.

4381906 is a deficient number, since it is larger than the sum of its proper divisors (2201594).

4381906 is a wasteful number, since it uses less digits than its factorization.

4381906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4381906 is about 2093.3002651316. The cubic root of 4381906 is about 163.6393273500.

The spelling of 4381906 in words is "four million, three hundred eighty-one thousand, nine hundred six".