1028042557 has 8 divisors (see below), whose sum is σ = 1087592000. Its totient is φ = 969037344.

The previous prime is 1028042551. The next prime is 1028042591. The reversal of 1028042557 is 7552408201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028042557 - 2¹⁵ = 1028009789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028042551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132168 + ... + 139729.

It is an arithmetic number, because the mean of its divisors is an integer number (135949000).

Almost surely, 2^1028042557 is an apocalyptic number.

It is an amenable number.

1028042557 is a deficient number, since it is larger than the sum of its proper divisors (59549443).

1028042557 is a wasteful number, since it uses less digits than its factorization.

1028042557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272115.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 1028042557 is about 32063.1027350754. The cubic root of 1028042557 is about 1009.2614792019.

The spelling of 1028042557 in words is "one billion, twenty-eight million, forty-two thousand, five hundred fifty-seven".