398836456225 has 9 divisors (see below), whose sum is σ = 494561121267. Its totient is φ = 319066638840.

The previous prime is 398836456219. The next prime is 398836456237. The reversal of 398836456225 is 522654638893.

The square root of 398836456225 is 631535.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 143581124241 + 255255331984 = 378921^2 + 505228^2 .

It is not a de Polignac number, because 398836456225 - 2⁹ = 398836455713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3094522 + ... + 3220828.

Almost surely, 2^398836456225 is an apocalyptic number.

398836456225 is the 631535-th square number.

398836456225 is the 315768-th centered octagonal number.

It is an amenable number.

398836456225 is a deficient number, since it is larger than the sum of its proper divisors (95724665042).

398836456225 is an frugal number, since it uses more digits than its factorization.

398836456225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252624 (or 126312 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 61.

The spelling of 398836456225 in words is "three hundred ninety-eight billion, eight hundred thirty-six million, four hundred fifty-six thousand, two hundred twenty-five".