396849591 has 16 divisors (see below), whose sum is σ = 597565920. Its totient is φ = 260228160.

The previous prime is 396849577. The next prime is 396849617. The reversal of 396849591 is 195948693.

396849591 is a `hidden beast` number, since 3 + 9 + 6 + 8 + 49 + 591 = 666.

It is not a de Polignac number, because 396849591 - 2⁷ = 396849463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396849571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118830 + ... + 122123.

It is an arithmetic number, because the mean of its divisors is an integer number (37347870).

Almost surely, 2^396849591 is an apocalyptic number.

396849591 is a deficient number, since it is larger than the sum of its proper divisors (200716329).

396849591 is a wasteful number, since it uses less digits than its factorization.

396849591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241023 (or 241017 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 396849591 is about 19921.0840819469. The cubic root of 396849591 is about 734.8668313506.

The spelling of 396849591 in words is "three hundred ninety-six million, eight hundred forty-nine thousand, five hundred ninety-one".