396209025 has 27 divisors (see below), whose sum is σ = 710189571. Its totient is φ = 211152240.

The previous prime is 396208979. The next prime is 396209027. The reversal of 396209025 is 520902693.

The square root of 396209025 is 19905.

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

396209025 is a `hidden beast` number, since 3 + 9 + 620 + 9 + 0 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 142635249 + 253573776 = 11943^2 + 15924^2 .

It is not a de Polignac number, because 396209025 - 2⁹ = 396208513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396209027) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 297912 + ... + 299238.

Almost surely, 2^396209025 is an apocalyptic number.

396209025 is the 19905-th square number.

396209025 is the 9953-rd centered octagonal number.

It is an amenable number.

396209025 is a deficient number, since it is larger than the sum of its proper divisors (313980546).

396209025 is an equidigital number, since it uses as much as digits as its factorization.

396209025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The cubic root of 396209025 is about 734.4712287361.

Multiplying 396209025 by its sum of digits (36), we get a square (14263524900 = 119430²).

The spelling of 396209025 in words is "three hundred ninety-six million, two hundred nine thousand, twenty-five".