396215237 has 4 divisors (see below), whose sum is σ = 432234816. Its totient is φ = 360195660.

The previous prime is 396215219. The next prime is 396215269. The reversal of 396215237 is 732512693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 396215237 - 2¹⁴ = 396198853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396215237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396215207) 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 3 ways as a sum of consecutive naturals, for example, 18009773 + ... + 18009794.

It is an arithmetic number, because the mean of its divisors is an integer number (108058704).

Almost surely, 2^396215237 is an apocalyptic number.

It is an amenable number.

396215237 is a deficient number, since it is larger than the sum of its proper divisors (36019579).

396215237 is a wasteful number, since it uses less digits than its factorization.

396215237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36019578.

The product of its digits is 68040, while the sum is 38.

The square root of 396215237 is about 19905.1560405841. The cubic root of 396215237 is about 734.4750672079.

The spelling of 396215237 in words is "three hundred ninety-six million, two hundred fifteen thousand, two hundred thirty-seven".