1028764788 has 12 divisors (see below), whose sum is σ = 2400451200. Its totient is φ = 342921592.

The previous prime is 1028764787. The next prime is 1028764871. The reversal of 1028764788 is 8874678201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1028764788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028764783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42865188 + ... + 42865211.

It is an arithmetic number, because the mean of its divisors is an integer number (200037600).

Almost surely, 2^1028764788 is an apocalyptic number.

It is an amenable number.

1028764788 is an abundant number, since it is smaller than the sum of its proper divisors (1371686412).

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

1028764788 is a wasteful number, since it uses less digits than its factorization.

1028764788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85730406 (or 85730404 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 51.

The square root of 1028764788 is about 32074.3634075565. The cubic root of 1028764788 is about 1009.4977694517.

The spelling of 1028764788 in words is "one billion, twenty-eight million, seven hundred sixty-four thousand, seven hundred eighty-eight".