28090000000 has 192 divisors, whose sum is σ = 71295227640. Its totient is φ = 11024000000.

The previous prime is 28089999967. The next prime is 28090000019. The reversal of 28090000000 is 9082.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 12 ways, for example, as 27654359616 + 435640384 = 166296^2 + 20872^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 529999974 + ... + 530000026.

Almost surely, 2^28090000000 is an apocalyptic number.

28090000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28090000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35647613820).

28090000000 is an abundant number, since it is smaller than the sum of its proper divisors (43205227640).

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

28090000000 is an frugal number, since it uses more digits than its factorization.

28090000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 28090000000 its reverse (9082), we get a palindrome (28090009082).

The spelling of 28090000000 in words is "twenty-eight billion, ninety million", and thus it is an aban number and an uban number.