3897839 has 16 divisors (see below), whose sum is σ = 4466976. Its totient is φ = 3369600.

The previous prime is 3897827. The next prime is 3897841. The reversal of 3897839 is 9387983.

It is a cyclic number.

It is not a de Polignac number, because 3897839 - 2⁴ = 3897823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3897793 and 3897802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24749 + ... + 24905.

It is an arithmetic number, because the mean of its divisors is an integer number (279186).

Almost surely, 2^3897839 is an apocalyptic number.

3897839 is a deficient number, since it is larger than the sum of its proper divisors (569137).

3897839 is a wasteful number, since it uses less digits than its factorization.

3897839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266.

The product of its digits is 326592, while the sum is 47.

The square root of 3897839 is about 1974.2945575572. The cubic root of 3897839 is about 157.3770132520.

It can be divided in two parts, 389 and 7839, that added together give a palindrome (8228).

The spelling of 3897839 in words is "three million, eight hundred ninety-seven thousand, eight hundred thirty-nine".