396431825 has 6 divisors (see below), whose sum is σ = 491575494. Its totient is φ = 317145440.

The previous prime is 396431809. The next prime is 396431869. The reversal of 396431825 is 528134693.

It can be written as a sum of positive squares in 3 ways, for example, as 9168784 + 387263041 = 3028^2 + 19679^2 .

It is not a de Polignac number, because 396431825 - 2⁴ = 396431809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7928612 + ... + 7928661.

It is an arithmetic number, because the mean of its divisors is an integer number (81929249).

Almost surely, 2^396431825 is an apocalyptic number.

It is an amenable number.

396431825 is a deficient number, since it is larger than the sum of its proper divisors (95143669).

396431825 is a wasteful number, since it uses less digits than its factorization.

396431825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15857283 (or 15857278 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 396431825 is about 19910.5957972131. The cubic root of 396431825 is about 734.6088745374.

The spelling of 396431825 in words is "three hundred ninety-six million, four hundred thirty-one thousand, eight hundred twenty-five".