297628656 has 80 divisors (see below), whose sum is σ = 876756384. Its totient is φ = 86188032.

The previous prime is 297628651. The next prime is 297628657. The reversal of 297628656 is 656826792.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 297628599 and 297628608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297628651) 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 15 ways as a sum of consecutive naturals, for example, 3421 + ... + 24636.

Almost surely, 2^297628656 is an apocalyptic number.

297628656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 297628656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438378192).

297628656 is an abundant number, since it is smaller than the sum of its proper divisors (579127728).

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

297628656 is a wasteful number, since it uses less digits than its factorization.

297628656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28098 (or 28092 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 297628656 is about 17251.9174586479. The cubic root of 297628656 is about 667.6644423649.

The spelling of 297628656 in words is "two hundred ninety-seven million, six hundred twenty-eight thousand, six hundred fifty-six".