1028145438 has 48 divisors (see below), whose sum is σ = 2290906800. Its totient is φ = 333048960.

The previous prime is 1028145413. The next prime is 1028145449. The reversal of 1028145438 is 8345418201.

1028145438 is a `hidden beast` number, since 102 + 8 + 1 + 4 + 543 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195933 + ... + 201111.

It is an arithmetic number, because the mean of its divisors is an integer number (47727225).

Almost surely, 2^1028145438 is an apocalyptic number.

1028145438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1028145438 is an abundant number, since it is smaller than the sum of its proper divisors (1262761362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1028145438 is a wasteful number, since it uses less digits than its factorization.

1028145438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497 (or 5494 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1028145438 is about 32064.7070468451. The cubic root of 1028145438 is about 1009.2951452423.

The spelling of 1028145438 in words is "one billion, twenty-eight million, one hundred forty-five thousand, four hundred thirty-eight".