3898440217 has 8 divisors (see below), whose sum is σ = 4608993600. Its totient is φ = 3226295184.

The previous prime is 3898440191. The next prime is 3898440253. The reversal of 3898440217 is 7120448983.

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

It is not a de Polignac number, because 3898440217 - 2⁷ = 3898440089 is a prime.

It is a super-2 number, since 2×3898440217² = 30395672251046014178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898440257) 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 7 ways as a sum of consecutive naturals, for example, 9601867 + ... + 9602272.

It is an arithmetic number, because the mean of its divisors is an integer number (576124200).

Almost surely, 2^3898440217 is an apocalyptic number.

It is an amenable number.

3898440217 is a deficient number, since it is larger than the sum of its proper divisors (710553383).

3898440217 is a wasteful number, since it uses less digits than its factorization.

3898440217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19204175.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 3898440217 is about 62437.4904764758. The cubic root of 3898440217 is about 1573.8510430549.

The spelling of 3898440217 in words is "three billion, eight hundred ninety-eight million, four hundred forty thousand, two hundred seventeen".