1028575831 has 2 divisors, whose sum is σ = 1028575832. Its totient is φ = 1028575830.

The previous prime is 1028575771. The next prime is 1028575903. The reversal of 1028575831 is 1385758201.

It is a weak prime.

It is an emirp because it is prime and its reverse (1385758201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028575831 - 2²⁵ = 995021399 is a prime.

It is a super-2 number, since 2×1028575831² = 2115936480234681122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028575631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514287915 + 514287916.

It is an arithmetic number, because the mean of its divisors is an integer number (514287916).

Almost surely, 2^1028575831 is an apocalyptic number.

1028575831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028575831 is an equidigital number, since it uses as much as digits as its factorization.

1028575831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 1028575831 is about 32071.4176643316. The cubic root of 1028575831 is about 1009.4359596152.

The spelling of 1028575831 in words is "one billion, twenty-eight million, five hundred seventy-five thousand, eight hundred thirty-one".