3989405 has 8 divisors (see below), whose sum is σ = 5471232. Its totient is φ = 2735568.

The previous prime is 3989393. The next prime is 3989413. The reversal of 3989405 is 5049893.

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

It is a cyclic number.

It is not a de Polignac number, because 3989405 - 2⁴ = 3989389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56957 + ... + 57026.

It is an arithmetic number, because the mean of its divisors is an integer number (683904).

Almost surely, 2^3989405 is an apocalyptic number.

3989405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3989405 is a deficient number, since it is larger than the sum of its proper divisors (1481827).

3989405 is a wasteful number, since it uses less digits than its factorization.

3989405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113995.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 3989405 is about 1997.3494937041. The cubic root of 3989405 is about 158.5998269853.

The spelling of 3989405 in words is "three million, nine hundred eighty-nine thousand, four hundred five".