1028855512 has 8 divisors (see below), whose sum is σ = 1929104100. Its totient is φ = 514427752.

The previous prime is 1028855501. The next prime is 1028855543. The reversal of 1028855512 is 2155588201.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64303462 + ... + 64303477.

Almost surely, 2^1028855512 is an apocalyptic number.

It is an amenable number.

1028855512 is a deficient number, since it is larger than the sum of its proper divisors (900248588).

1028855512 is a wasteful number, since it uses less digits than its factorization.

1028855512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128606945 (or 128606941 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 37.

The square root of 1028855512 is about 32075.7776523033. Note that the first 3 decimals coincide. The cubic root of 1028855512 is about 1009.5274435439.

The spelling of 1028855512 in words is "one billion, twenty-eight million, eight hundred fifty-five thousand, five hundred twelve".