1028934657 has 14 divisors (see below), whose sum is σ = 1542697362. Its totient is φ = 685955952.

The previous prime is 1028934629. The next prime is 1028934661. The reversal of 1028934657 is 7564398201.

1028934657 is a `hidden beast` number, since 102 + 89 + 3 + 465 + 7 = 666.

1028934657 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 621056241 + 407878416 = 24921^2 + 20196^2 .

It is not a de Polignac number, because 1028934657 - 2¹⁴ = 1028918273 is a prime.

1028934657 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (1028934667) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 704988 + ... + 706445.

It is a 2-persistent number, because it is pandigital, and so is 2⋅1028934657 = 2057869314, but 3⋅1028934657 = 3086803971 is not.

Almost surely, 2^1028934657 is an apocalyptic number.

It is an amenable number.

1028934657 is a deficient number, since it is larger than the sum of its proper divisors (513762705).

1028934657 is an frugal number, since it uses more digits than its factorization.

1028934657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411451 (or 1411436 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1028934657 is about 32077.0113476926. The cubic root of 1028934657 is about 1009.5533289411.

The spelling of 1028934657 in words is "one billion, twenty-eight million, nine hundred thirty-four thousand, six hundred fifty-seven".