28011475800 has 864 divisors, whose sum is σ = 124521196800. Its totient is φ = 5508518400.

The previous prime is 28011475769. The next prime is 28011475813. The reversal of 28011475800 is 857411082.

28011475800 is a `hidden beast` number, since 28 + 0 + 11 + 47 + 580 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 215 ways as a sum of consecutive naturals, for example, 28966917 + ... + 28967883.

Almost surely, 2^28011475800 is an apocalyptic number.

28011475800 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 28011475800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62260598400).

28011475800 is an abundant number, since it is smaller than the sum of its proper divisors (96509721000).

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

28011475800 is a wasteful number, since it uses less digits than its factorization.

28011475800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

Adding to 28011475800 its reverse (857411082), we get a palindrome (28868886882).

The spelling of 28011475800 in words is "twenty-eight billion, eleven million, four hundred seventy-five thousand, eight hundred".