396545643 has 12 divisors (see below), whose sum is σ = 616848960. Its totient is φ = 244028016.

The previous prime is 396545581. The next prime is 396545657. The reversal of 396545643 is 346545693.

396545643 is a `hidden beast` number, since 39 + 6 + 54 + 564 + 3 = 666.

It is not a de Polignac number, because 396545643 - 2⁹ = 396545131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396545663) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1694523 + ... + 1694756.

It is an arithmetic number, because the mean of its divisors is an integer number (51404080).

Almost surely, 2^396545643 is an apocalyptic number.

396545643 is a deficient number, since it is larger than the sum of its proper divisors (220303317).

396545643 is a wasteful number, since it uses less digits than its factorization.

396545643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389298 (or 3389295 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 396545643 is about 19913.4538189637. The cubic root of 396545643 is about 734.6791713762.

The spelling of 396545643 in words is "three hundred ninety-six million, five hundred forty-five thousand, six hundred forty-three".