1001001028 has 12 divisors (see below), whose sum is σ = 1755709200. Its totient is φ = 499369832.

The previous prime is 1001001017. The next prime is 1001001037. The reversal of 1001001028 is 8201001001.

It is a junction number, because it is equal to n+sod(n) for n = 1001000999 and 1001001017.

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, 280678 + ... + 284221.

It is an arithmetic number, because the mean of its divisors is an integer number (146309100).

Almost surely, 2^1001001028 is an apocalyptic number.

It is an amenable number.

1001001028 is a deficient number, since it is larger than the sum of its proper divisors (754708172).

1001001028 is a wasteful number, since it uses less digits than its factorization.

1001001028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565346 (or 565344 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1001001028 is about 31638.6002850948. The cubic root of 1001001028 is about 1000.3335647222. Note that the first 3 decimals are identical.

Adding to 1001001028 its reverse (8201001001), we get a palindrome (9202002029).

The spelling of 1001001028 in words is "one billion, one million, one thousand, twenty-eight".