1028357469 has 12 divisors (see below), whose sum is σ = 1485690492. Its totient is φ = 685440000.

The previous prime is 1028357453. The next prime is 1028357503. The reversal of 1028357469 is 9647538201.

1028357469 is a `hidden beast` number, since 10 + 2 + 8 + 3 + 574 + 69 = 666.

1028357469 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 2 ways, for example, as 112084569 + 916272900 = 10587^2 + 30270^2 .

It is not a de Polignac number, because 1028357469 - 2⁴ = 1028357453 is a prime.

It is a super-2 number, since 2×1028357469² = 2115038168096171922, which contains 22 as substring.

1028357469 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 (1028358469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69789 + ... + 83229.

It is an arithmetic number, because the mean of its divisors is an integer number (123807541).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1028357469 = 2056714938, but 3⋅1028357469 = 3085072407 is not.

Almost surely, 2^1028357469 is an apocalyptic number.

It is an amenable number.

1028357469 is a deficient number, since it is larger than the sum of its proper divisors (457333023).

1028357469 is a wasteful number, since it uses less digits than its factorization.

1028357469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21948 (or 21945 counting only the distinct ones).

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

The square root of 1028357469 is about 32068.0131751251. The cubic root of 1028357469 is about 1009.3645216624.

The spelling of 1028357469 in words is "one billion, twenty-eight million, three hundred fifty-seven thousand, four hundred sixty-nine".