3998365 has 16 divisors (see below), whose sum is σ = 5564160. Its totient is φ = 2701440.

The previous prime is 3998353. The next prime is 3998369. The reversal of 3998365 is 5638993.

3998365 is nontrivially palindromic in base 9.

3998365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3998365 - 2⁵ = 3998333 is a prime.

3998365 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 3289.

It is an arithmetic number, because the mean of its divisors is an integer number (347760).

Almost surely, 2^3998365 is an apocalyptic number.

3998365 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3998365 is a deficient number, since it is larger than the sum of its proper divisors (1565795).

3998365 is a wasteful number, since it uses less digits than its factorization.

3998365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692.

The product of its digits is 174960, while the sum is 43.

The square root of 3998365 is about 1999.5912082223. The cubic root of 3998365 is about 158.7184739100.

The spelling of 3998365 in words is "three million, nine hundred ninety-eight thousand, three hundred sixty-five".