1028788028 has 6 divisors (see below), whose sum is σ = 1800379056. Its totient is φ = 514394012.

The previous prime is 1028788027. The next prime is 1028788037. The reversal of 1028788028 is 8208878201.

It is a super-2 number, since 2×1028788028² = 2116809613112257568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1028788028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028788027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128598500 + ... + 128598507.

It is an arithmetic number, because the mean of its divisors is an integer number (300063176).

Almost surely, 2^1028788028 is an apocalyptic number.

It is an amenable number.

1028788028 is a deficient number, since it is larger than the sum of its proper divisors (771591028).

1028788028 is a wasteful number, since it uses less digits than its factorization.

1028788028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257197011 (or 257197009 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 1028788028 is about 32074.7256886166. The cubic root of 1028788028 is about 1009.5053709792.

The spelling of 1028788028 in words is "one billion, twenty-eight million, seven hundred eighty-eight thousand, twenty-eight".