1028171860 has 24 divisors (see below), whose sum is σ = 2160707976. Its totient is φ = 410974080.

The previous prime is 1028171843. The next prime is 1028171863. The reversal of 1028171860 is 681718201.

It can be written as a sum of positive squares in 4 ways, for example, as 576864324 + 451307536 = 24018^2 + 21244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028171863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11370 + ... + 46750.

It is an arithmetic number, because the mean of its divisors is an integer number (90029499).

Almost surely, 2^1028171860 is an apocalyptic number.

1028171860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028171860 is an abundant number, since it is smaller than the sum of its proper divisors (1132536116).

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

1028171860 is a wasteful number, since it uses less digits than its factorization.

1028171860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36843 (or 36841 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 1028171860 is about 32065.1190548234. The cubic root of 1028171860 is about 1009.3037910255.

The spelling of 1028171860 in words is "one billion, twenty-eight million, one hundred seventy-one thousand, eight hundred sixty".