3989381 has 8 divisors (see below), whose sum is σ = 4417824. Its totient is φ = 3571920.

The previous prime is 3989371. The next prime is 3989383. The reversal of 3989381 is 1839893.

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

It is not a de Polignac number, because 3989381 - 2⁶ = 3989317 is a prime.

It is a super-2 number, since 2×3989381² = 31830321526322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (552228).

Almost surely, 2^3989381 is an apocalyptic number.

It is an amenable number.

3989381 is a deficient number, since it is larger than the sum of its proper divisors (428443).

3989381 is a wasteful number, since it uses less digits than its factorization.

3989381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491.

The product of its digits is 46656, while the sum is 41.

The square root of 3989381 is about 1997.3434857330. The cubic root of 3989381 is about 158.5995089426.

It can be divided in two parts, 398 and 9381, that added together give a palindrome (9779).

The spelling of 3989381 in words is "three million, nine hundred eighty-nine thousand, three hundred eighty-one".