1028771000 has 64 divisors (see below), whose sum is σ = 2417294880. Its totient is φ = 409804800.

The previous prime is 1028770957. The next prime is 1028771041. The reversal of 1028771000 is 1778201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254999 + ... + 259001.

Almost surely, 2^1028771000 is an apocalyptic number.

1028771000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028771000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208647440).

1028771000 is an abundant number, since it is smaller than the sum of its proper divisors (1388523880).

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

1028771000 is a wasteful number, since it uses less digits than its factorization.

1028771000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1028771000 is about 32074.4602448740. The cubic root of 1028771000 is about 1009.4998013342.

The spelling of 1028771000 in words is "one billion, twenty-eight million, seven hundred seventy-one thousand".