868828257 has 48 divisors (see below), whose sum is σ = 1451923200. Its totient is φ = 495110880.

The previous prime is 868828241. The next prime is 868828271. The reversal of 868828257 is 752828868.

It is not a de Polignac number, because 868828257 - 2⁴ = 868828241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868828757) 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 47 ways as a sum of consecutive naturals, for example, 259798 + ... + 263120.

It is an arithmetic number, because the mean of its divisors is an integer number (30248400).

Almost surely, 2^868828257 is an apocalyptic number.

It is an amenable number.

868828257 is a deficient number, since it is larger than the sum of its proper divisors (583094943).

868828257 is a wasteful number, since it uses less digits than its factorization.

868828257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498 (or 3495 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The square root of 868828257 is about 29475.8928109057. The cubic root of 868828257 is about 954.2114986692.

The spelling of 868828257 in words is "eight hundred sixty-eight million, eight hundred twenty-eight thousand, two hundred fifty-seven".