3898985 has 4 divisors (see below), whose sum is σ = 4678788. Its totient is φ = 3119184.

The previous prime is 3898981. The next prime is 3898991. The reversal of 3898985 is 5898983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 2301289 = 1264^2 + 1517^2 .

It is a cyclic number.

It is not a de Polignac number, because 3898985 - 2² = 3898981 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898981) 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, 389894 + ... + 389903.

It is an arithmetic number, because the mean of its divisors is an integer number (1169697).

Almost surely, 2^3898985 is an apocalyptic number.

It is an amenable number.

3898985 is a deficient number, since it is larger than the sum of its proper divisors (779803).

3898985 is an equidigital number, since it uses as much as digits as its factorization.

3898985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779802.

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

The square root of 3898985 is about 1974.5847664762. The cubic root of 3898985 is about 157.3924351636.

The spelling of 3898985 in words is "three million, eight hundred ninety-eight thousand, nine hundred eighty-five".