268728461 has 2 divisors, whose sum is σ = 268728462. Its totient is φ = 268728460.

The previous prime is 268728451. The next prime is 268728511. The reversal of 268728461 is 164827862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236975236 + 31753225 = 15394^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 268728461 - 2²⁶ = 201619597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268728451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134364230 + 134364231.

It is an arithmetic number, because the mean of its divisors is an integer number (134364231).

Almost surely, 2^268728461 is an apocalyptic number.

It is an amenable number.

268728461 is a deficient number, since it is larger than the sum of its proper divisors (1).

268728461 is an equidigital number, since it uses as much as digits as its factorization.

268728461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 268728461 is about 16392.9393642507. The cubic root of 268728461 is about 645.3141998220.

The spelling of 268728461 in words is "two hundred sixty-eight million, seven hundred twenty-eight thousand, four hundred sixty-one".