398844225 has 108 divisors (see below), whose sum is σ = 820383876. Its totient is φ = 184504320.

The previous prime is 398844217. The next prime is 398844241. The reversal of 398844225 is 522448893.

It can be written as a sum of positive squares in 18 ways, for example, as 395373456 + 3470769 = 19884^2 + 1863^2 .

It is not a de Polignac number, because 398844225 - 2³ = 398844217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 646117 + ... + 646733.

It is an arithmetic number, because the mean of its divisors is an integer number (7596147).

Almost surely, 2^398844225 is an apocalyptic number.

It is an amenable number.

398844225 is an abundant number, since it is smaller than the sum of its proper divisors (421539651).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398844225 is a wasteful number, since it uses less digits than its factorization.

398844225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 655 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 398844225 is about 19971.0847226684. The cubic root of 398844225 is about 736.0959632129.

The spelling of 398844225 in words is "three hundred ninety-eight million, eight hundred forty-four thousand, two hundred twenty-five".