396990186 has 8 divisors (see below), whose sum is σ = 793980384. Its totient is φ = 132330060.

The previous prime is 396990169. The next prime is 396990197. The reversal of 396990186 is 681099693.

It is a sphenic number, since it is the product of 3 distinct primes.

396990186 is an admirable number.

It is an unprimeable number.

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, 33082510 + ... + 33082521.

It is an arithmetic number, because the mean of its divisors is an integer number (99247548).

Almost surely, 2^396990186 is an apocalyptic number.

396990186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

396990186 is a wasteful number, since it uses less digits than its factorization.

396990186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66165036.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 396990186 is about 19924.6125683788. The cubic root of 396990186 is about 734.9536034390.

The spelling of 396990186 in words is "three hundred ninety-six million, nine hundred ninety thousand, one hundred eighty-six".