3898391 has 6 divisors (see below), whose sum is σ = 4534920. Its totient is φ = 3341436.

The previous prime is 3898379. The next prime is 3898393. The reversal of 3898391 is 1938983.

It is not a de Polignac number, because 3898391 - 2¹⁴ = 3882007 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3898393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39731 + ... + 39828.

It is an arithmetic number, because the mean of its divisors is an integer number (755820).

Almost surely, 2^3898391 is an apocalyptic number.

3898391 is a deficient number, since it is larger than the sum of its proper divisors (636529).

3898391 is an equidigital number, since it uses as much as digits as its factorization.

3898391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79573 (or 79566 counting only the distinct ones).

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

The square root of 3898391 is about 1974.4343493771. The cubic root of 3898391 is about 157.3844419846.

It can be divided in two parts, 38983 and 91, that multiplied together give a palindrome (3547453).

The spelling of 3898391 in words is "three million, eight hundred ninety-eight thousand, three hundred ninety-one".