1028209900 has 36 divisors (see below), whose sum is σ = 2267806240. Its totient is φ = 404539200.

The previous prime is 1028209841. The next prime is 1028209943. The reversal of 1028209900 is 99028201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78180 + ... + 90379.

Almost surely, 2^1028209900 is an apocalyptic number.

1028209900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028209900 is an abundant number, since it is smaller than the sum of its proper divisors (1239596340).

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

1028209900 is a wasteful number, since it uses less digits than its factorization.

1028209900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168634 (or 168627 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1028209900 is about 32065.7122172579. The cubic root of 1028209900 is about 1009.3162381803.

The spelling of 1028209900 in words is "one billion, twenty-eight million, two hundred nine thousand, nine hundred".