1028171859 has 32 divisors (see below), whose sum is σ = 1644862464. Its totient is φ = 562951680.

The previous prime is 1028171843. The next prime is 1028171863. The reversal of 1028171859 is 9581718201.

It is not a de Polignac number, because 1028171859 - 2⁴ = 1028171843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1028171859.

It is not an unprimeable number, because it can be changed into a prime (1028171869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5334 + ... + 45659.

It is an arithmetic number, because the mean of its divisors is an integer number (51401952).

Almost surely, 2^1028171859 is an apocalyptic number.

1028171859 is a deficient number, since it is larger than the sum of its proper divisors (616690605).

1028171859 is a wasteful number, since it uses less digits than its factorization.

1028171859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51067.

The product of its (nonzero) digits is 40320, while the sum is 42.

The square root of 1028171859 is about 32065.1190392302. The cubic root of 1028171859 is about 1009.3037906983.

The spelling of 1028171859 in words is "one billion, twenty-eight million, one hundred seventy-one thousand, eight hundred fifty-nine".