28055866500 has 72 divisors (see below), whose sum is σ = 88506921048. Its totient is φ = 7481563200.

The previous prime is 28055866477. The next prime is 28055866511. The reversal of 28055866500 is 566855082.

28055866500 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 586 + 65 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 956484 + 28054910016 = 978^2 + 167496^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3112819 + ... + 3121818.

Almost surely, 2^28055866500 is an apocalyptic number.

28055866500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28055866500 is an abundant number, since it is smaller than the sum of its proper divisors (60451054548).

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

28055866500 is a wasteful number, since it uses less digits than its factorization.

28055866500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234662 (or 6234647 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 28055866500 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-six thousand, five hundred".