397844667 has 24 divisors (see below), whose sum is σ = 659904960. Its totient is φ = 228426480.

The previous prime is 397844641. The next prime is 397844687. The reversal of 397844667 is 766448793.

It is a happy number.

It is not a de Polignac number, because 397844667 - 2⁷ = 397844539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397844617) 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 23 ways as a sum of consecutive naturals, for example, 103873 + ... + 107634.

It is an arithmetic number, because the mean of its divisors is an integer number (27496040).

Almost surely, 2^397844667 is an apocalyptic number.

397844667 is a deficient number, since it is larger than the sum of its proper divisors (262060293).

397844667 is a wasteful number, since it uses less digits than its factorization.

397844667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211543 (or 211540 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 397844667 is about 19946.0438934642. The cubic root of 397844667 is about 735.4805298624.

The spelling of 397844667 in words is "three hundred ninety-seven million, eight hundred forty-four thousand, six hundred sixty-seven".