3906538 has 4 divisors (see below), whose sum is σ = 5859810. Its totient is φ = 1953268.

The previous prime is 3906493. The next prime is 3906541. The reversal of 3906538 is 8356093.

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., 3229209 + 677329 = 1797^2 + 823^2 .

It is a super-2 number, since 2×3906538² = 30522078290888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976633 + ... + 976636.

Almost surely, 2^3906538 is an apocalyptic number.

3906538 is a deficient number, since it is larger than the sum of its proper divisors (1953272).

3906538 is a wasteful number, since it uses less digits than its factorization.

3906538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953271.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 3906538 is about 1976.4963951396. The cubic root of 3906538 is about 157.4940016192.

It can be divided in two parts, 3906 and 538, that added together give a palindrome (4444).

The spelling of 3906538 in words is "three million, nine hundred six thousand, five hundred thirty-eight".