397306893688 has 8 divisors (see below), whose sum is σ = 744950425680. Its totient is φ = 198653446840.

The previous prime is 397306893653. The next prime is 397306893743. The reversal of 397306893688 is 886398603793.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent 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 as a sum of consecutive naturals, namely, 24831680848 + ... + 24831680863.

It is an arithmetic number, because the mean of its divisors is an integer number (93118803210).

Almost surely, 2^397306893688 is an apocalyptic number.

It is an amenable number.

397306893688 is a deficient number, since it is larger than the sum of its proper divisors (347643531992).

397306893688 is a wasteful number, since it uses less digits than its factorization.

397306893688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49663361717 (or 49663361713 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 397306893688 in words is "three hundred ninety-seven billion, three hundred six million, eight hundred ninety-three thousand, six hundred eighty-eight".