297638656 has 108 divisors (see below), whose sum is σ = 707902608. Its totient is φ = 122259456.

The previous prime is 297638651. The next prime is 297638659. The reversal of 297638656 is 656836792.

It is not an unprimeable number, because it can be changed into a prime (297638651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4442335 + ... + 4442401.

Almost surely, 2^297638656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 297638656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353951304).

297638656 is an abundant number, since it is smaller than the sum of its proper divisors (410263952).

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

297638656 is an frugal number, since it uses more digits than its factorization.

297638656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 113 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The square root of 297638656 is about 17252.2072790701. The cubic root of 297638656 is about 667.6719198815.

The spelling of 297638656 in words is "two hundred ninety-seven million, six hundred thirty-eight thousand, six hundred fifty-six".