398843449 has 4 divisors (see below), whose sum is σ = 408571380. Its totient is φ = 389115520.

The previous prime is 398843441. The next prime is 398843453. The reversal of 398843449 is 944348893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944348893 = 7237 ⋅130489.

It can be written as a sum of positive squares in 2 ways, for example, as 118113424 + 280730025 = 10868^2 + 16755^2 .

It is a cyclic number.

It is not a de Polignac number, because 398843449 - 2³ = 398843441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398843396 and 398843405.

It is not an unprimeable number, because it can be changed into a prime (398843441) 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, 4863904 + ... + 4863985.

It is an arithmetic number, because the mean of its divisors is an integer number (102142845).

Almost surely, 2^398843449 is an apocalyptic number.

It is an amenable number.

398843449 is a deficient number, since it is larger than the sum of its proper divisors (9727931).

398843449 is an equidigital number, since it uses as much as digits as its factorization.

398843449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727930.

The product of its digits is 2985984, while the sum is 52.

The square root of 398843449 is about 19971.0652945705. The cubic root of 398843449 is about 736.0954858245.

It can be divided in two parts, 39 and 8843449, that added together give a palindrome (8843488).

The spelling of 398843449 in words is "three hundred ninety-eight million, eight hundred forty-three thousand, four hundred forty-nine".