396536447 has 4 divisors (see below), whose sum is σ = 396578016. Its totient is φ = 396494880.

The previous prime is 396536443. The next prime is 396536473. The reversal of 396536447 is 744635693.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 744635693 = 37 ⋅20125289.

It is a cyclic number.

It is not a de Polignac number, because 396536447 - 2² = 396536443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396536443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463 + ... + 28199.

It is an arithmetic number, because the mean of its divisors is an integer number (99144504).

Almost surely, 2^396536447 is an apocalyptic number.

396536447 is a deficient number, since it is larger than the sum of its proper divisors (41569).

396536447 is a wasteful number, since it uses less digits than its factorization.

396536447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41568.

The product of its digits is 1632960, while the sum is 47.

The square root of 396536447 is about 19913.2229184530. Note that the first 3 decimals coincide. The cubic root of 396536447 is about 734.6734921965.

The spelling of 396536447 in words is "three hundred ninety-six million, five hundred thirty-six thousand, four hundred forty-seven".