28285628100 has 72 divisors (see below), whose sum is σ = 82825844640. Its totient is φ = 7451950080.

The previous prime is 28285628099. The next prime is 28285628117. The reversal of 28285628100 is 182658282.

It is a super-2 number, since 2×28285628100² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 543085 + ... + 592884.

Almost surely, 2^28285628100 is an apocalyptic number.

28285628100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28285628100 is an abundant number, since it is smaller than the sum of its proper divisors (54540216540).

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

28285628100 is a wasteful number, since it uses less digits than its factorization.

28285628100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136069 (or 1136062 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 28285628100 in words is "twenty-eight billion, two hundred eighty-five million, six hundred twenty-eight thousand, one hundred".