1028657349 has 6 divisors (see below), whose sum is σ = 1485838406. Its totient is φ = 685771560.

The previous prime is 1028657339. The next prime is 1028657351. The reversal of 1028657349 is 9437568201.

1028657349 is a `hidden beast` number, since 10 + 28 + 6 + 573 + 49 = 666.

1028657349 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., 901080324 + 127577025 = 30018^2 + 11295^2 .

It is not a de Polignac number, because 1028657349 - 2⁵ = 1028657317 is a prime.

It is a Duffinian number.

1028657349 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028657339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57147622 + ... + 57147639.

It is a 2-persistent number, because it is pandigital, and so is 2⋅1028657349 = 2057314698, but 3⋅1028657349 = 3085972047 is not.

Almost surely, 2^1028657349 is an apocalyptic number.

It is an amenable number.

1028657349 is a deficient number, since it is larger than the sum of its proper divisors (457181057).

1028657349 is a wasteful number, since it uses less digits than its factorization.

1028657349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114295267 (or 114295264 counting only the distinct ones).

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

The square root of 1028657349 is about 32072.6885215443. The cubic root of 1028657349 is about 1009.4626259450.

The spelling of 1028657349 in words is "one billion, twenty-eight million, six hundred fifty-seven thousand, three hundred forty-nine".