396818225 has 6 divisors (see below), whose sum is σ = 492054630. Its totient is φ = 317454560.

The previous prime is 396818221. The next prime is 396818251. The reversal of 396818225 is 522818693.

It can be written as a sum of positive squares in 3 ways, for example, as 32809984 + 364008241 = 5728^2 + 19079^2 .

It is not a de Polignac number, because 396818225 - 2² = 396818221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (396818221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7936340 + ... + 7936389.

It is an arithmetic number, because the mean of its divisors is an integer number (82009105).

Almost surely, 2^396818225 is an apocalyptic number.

It is an amenable number.

396818225 is a deficient number, since it is larger than the sum of its proper divisors (95236405).

396818225 is a wasteful number, since it uses less digits than its factorization.

396818225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872739 (or 15872734 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 396818225 is about 19920.2968100377. The cubic root of 396818225 is about 734.8474701612.

The spelling of 396818225 in words is "three hundred ninety-six million, eight hundred eighteen thousand, two hundred twenty-five".