28206104472 has 768 divisors, whose sum is σ = 105406479360. Its totient is φ = 6855819264.

The previous prime is 28206104429. The next prime is 28206104477. The reversal of 28206104472 is 27440160282.

28206104472 is a `hidden beast` number, since 2 + 8 + 206 + 1 + 0 + 447 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206104477) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 249611488 + ... + 249611600.

It is an arithmetic number, because the mean of its divisors is an integer number (137248020).

Almost surely, 2^28206104472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28206104472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52703239680).

28206104472 is an abundant number, since it is smaller than the sum of its proper divisors (77200374888).

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

28206104472 is a wasteful number, since it uses less digits than its factorization.

28206104472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 28206104472 in words is "twenty-eight billion, two hundred six million, one hundred four thousand, four hundred seventy-two".