3858989 has 4 divisors (see below), whose sum is σ = 3963324. Its totient is φ = 3754656.

The previous prime is 3858971. The next prime is 3858991. The reversal of 3858989 is 9898583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9898583 = 2797 ⋅3539.

It can be written as a sum of positive squares in 2 ways, for example, as 2941225 + 917764 = 1715^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 3858989 - 2²⁰ = 2810413 is a prime.

It is a super-2 number, since 2×3858989² = 29783592204242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3858929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52112 + ... + 52185.

It is an arithmetic number, because the mean of its divisors is an integer number (990831).

Almost surely, 2^3858989 is an apocalyptic number.

It is an amenable number.

3858989 is a deficient number, since it is larger than the sum of its proper divisors (104335).

3858989 is a wasteful number, since it uses less digits than its factorization.

3858989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104334.

The product of its digits is 622080, while the sum is 50.

The square root of 3858989 is about 1964.4309608637. The cubic root of 3858989 is about 156.8524043264.

The spelling of 3858989 in words is "three million, eight hundred fifty-eight thousand, nine hundred eighty-nine".