1998900828 has 30 divisors (see below), whose sum is σ = 5225522456. Its totient is φ = 666300168.

The previous prime is 1998900821. The next prime is 1998900857. The reversal of 1998900828 is 8280098991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998900821) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 3084400 + ... + 3085047.

Almost surely, 2^1998900828 is an apocalyptic number.

1998900828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1998900828 is an abundant number, since it is smaller than the sum of its proper divisors (3226621628).

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

1998900828 is a wasteful number, since it uses less digits than its factorization.

1998900828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169463 (or 6169452 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 1998900828 is about 44709.0687444952. The cubic root of 1998900828 is about 1259.6901959416.

The spelling of 1998900828 in words is "one billion, nine hundred ninety-eight million, nine hundred thousand, eight hundred twenty-eight".