3909538 has 4 divisors (see below), whose sum is σ = 5864310. Its totient is φ = 1954768.

The previous prime is 3909533. The next prime is 3909547. The reversal of 3909538 is 8359093.

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., 3853369 + 56169 = 1963^2 + 237^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3909497 and 3909506.

It is not an unprimeable number, because it can be changed into a prime (3909533) by changing a digit.

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, 977383 + ... + 977386.

Almost surely, 2^3909538 is an apocalyptic number.

3909538 is a deficient number, since it is larger than the sum of its proper divisors (1954772).

3909538 is a wasteful number, since it uses less digits than its factorization.

3909538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954771.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 3909538 is about 1977.2551681561. The cubic root of 3909538 is about 157.5343067956.

The spelling of 3909538 in words is "three million, nine hundred nine thousand, five hundred thirty-eight".