3998455 has 8 divisors (see below), whose sum is σ = 5050800. Its totient is φ = 3030336.

The previous prime is 3998419. The next prime is 3998459. The reversal of 3998455 is 5548993.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3998455 - 2¹⁹ = 3474167 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9² + 9⁵ + 8⁵ + 4³ + 5⁹ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20950 + ... + 21139.

It is an arithmetic number, because the mean of its divisors is an integer number (631350).

Almost surely, 2^3998455 is an apocalyptic number.

3998455 is a deficient number, since it is larger than the sum of its proper divisors (1052345).

3998455 is a wasteful number, since it uses less digits than its factorization.

3998455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42113.

The product of its digits is 194400, while the sum is 43.

The square root of 3998455 is about 1999.6137126955. The cubic root of 3998455 is about 158.7196647763.

The spelling of 3998455 in words is "three million, nine hundred ninety-eight thousand, four hundred fifty-five".