1028778568 has 16 divisors (see below), whose sum is σ = 1957751280. Its totient is φ = 506711568.

The previous prime is 1028778551. The next prime is 1028778577. The reversal of 1028778568 is 8658778201.

It is a happy number.

1028778568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1028778568² = 2116770683952261248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959146 + ... + 960217.

It is an arithmetic number, because the mean of its divisors is an integer number (122359455).

Almost surely, 2^1028778568 is an apocalyptic number.

It is an amenable number.

1028778568 is a deficient number, since it is larger than the sum of its proper divisors (928972712).

1028778568 is a wasteful number, since it uses less digits than its factorization.

1028778568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919436 (or 1919432 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 52.

The square root of 1028778568 is about 32074.5782201419. The cubic root of 1028778568 is about 1009.5022767396.

The spelling of 1028778568 in words is "one billion, twenty-eight million, seven hundred seventy-eight thousand, five hundred sixty-eight".