1028794488 has 128 divisors (see below), whose sum is σ = 2731622400. Its totient is φ = 322430976.

The previous prime is 1028794477. The next prime is 1028794493. The reversal of 1028794488 is 8844978201.

It is a self number, because there is not a number n which added to its sum of digits gives 1028794488.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8100681 + ... + 8100807.

It is an arithmetic number, because the mean of its divisors is an integer number (21340800).

Almost surely, 2^1028794488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028794488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365811200).

1028794488 is an abundant number, since it is smaller than the sum of its proper divisors (1702827912).

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

1028794488 is a wasteful number, since it uses less digits than its factorization.

1028794488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 1028794488 is about 32074.8263908006. The cubic root of 1028794488 is about 1009.5074839480.

The spelling of 1028794488 in words is "one billion, twenty-eight million, seven hundred ninety-four thousand, four hundred eighty-eight".