8398806025 has 9 divisors (see below), whose sum is σ = 10415087701. Its totient is φ = 6718678240.

The previous prime is 8398806011. The next prime is 8398806043. The reversal of 8398806025 is 5206088938.

The square root of 8398806025 is 91645.

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

It can be written as a sum of positive squares in 4 ways, for example, as 175218169 + 8223587856 = 13237^2 + 90684^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8398806025 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8398806025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 449061 + ... + 467389.

Almost surely, 2^8398806025 is an apocalyptic number.

8398806025 is the 91645-th square number.

8398806025 is the 45823-rd centered octagonal number.

It is an amenable number.

8398806025 is a deficient number, since it is larger than the sum of its proper divisors (2016281676).

8398806025 is an frugal number, since it uses more digits than its factorization.

8398806025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36668 (or 18334 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The cubic root of 8398806025 is about 2032.6963954279.

Multiplying 8398806025 by its sum of digits (49), we get a square (411541495225 = 641515²).

The spelling of 8398806025 in words is "eight billion, three hundred ninety-eight million, eight hundred six thousand, twenty-five".