28022471100 has 288 divisors, whose sum is σ = 102125408000. Its totient is φ = 6534639360.

The previous prime is 28022471077. The next prime is 28022471117. The reversal of 28022471100 is 117422082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 645891 + ... + 687909.

Almost surely, 2^28022471100 is an apocalyptic number.

28022471100 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 28022471100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51062704000).

28022471100 is an abundant number, since it is smaller than the sum of its proper divisors (74102936900).

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

28022471100 is a wasteful number, since it uses less digits than its factorization.

28022471100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42074 (or 42061 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

Adding to 28022471100 its reverse (117422082), we get a palindrome (28139893182).

The spelling of 28022471100 in words is "twenty-eight billion, twenty-two million, four hundred seventy-one thousand, one hundred".