396628191 has 16 divisors (see below), whose sum is σ = 588924000. Its totient is φ = 263821824.

The previous prime is 396628187. The next prime is 396628217. The reversal of 396628191 is 191826693.

It is a happy number.

396628191 is a `hidden beast` number, since 3 + 9 + 6 + 628 + 19 + 1 = 666.

It is not a de Polignac number, because 396628191 - 2² = 396628187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396628151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4236 + ... + 28481.

It is an arithmetic number, because the mean of its divisors is an integer number (36807750).

Almost surely, 2^396628191 is an apocalyptic number.

396628191 is a deficient number, since it is larger than the sum of its proper divisors (192295809).

396628191 is a wasteful number, since it uses less digits than its factorization.

396628191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33175 (or 33169 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 396628191 is about 19915.5263801889. The cubic root of 396628191 is about 734.7301466671.

The spelling of 396628191 in words is "three hundred ninety-six million, six hundred twenty-eight thousand, one hundred ninety-one".