1028360657 has 4 divisors (see below), whose sum is σ = 1030422000. Its totient is φ = 1026299316.

The previous prime is 1028360639. The next prime is 1028360717. The reversal of 1028360657 is 7560638201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7560638201 = 37 ⋅204341573.

It is a cyclic number.

It is not a de Polignac number, because 1028360657 - 2²⁶ = 961251793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028360657.

It is not an unprimeable number, because it can be changed into a prime (1028360857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029923 + ... + 1030920.

It is an arithmetic number, because the mean of its divisors is an integer number (257605500).

Almost surely, 2^1028360657 is an apocalyptic number.

It is an amenable number.

1028360657 is a deficient number, since it is larger than the sum of its proper divisors (2061343).

1028360657 is an equidigital number, since it uses as much as digits as its factorization.

1028360657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061342.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1028360657 is about 32068.0628819391. The cubic root of 1028360657 is about 1009.3655647014.

Adding to 1028360657 its reverse (7560638201), we get a palindrome (8588998858).

The spelling of 1028360657 in words is "one billion, twenty-eight million, three hundred sixty thousand, six hundred fifty-seven".