28222503408 has 200 divisors, whose sum is σ = 90368251776. Its totient is φ = 8431516800.

The previous prime is 28222503391. The next prime is 28222503433. The reversal of 28222503408 is 80430522282.

28222503408 is a `hidden beast` number, since 28 + 2 + 225 + 0 + 3 + 408 = 666.

It is a super-2 number, since 2×28222503408² (a number of 22 digits) contains 22 as substring.

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 polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 998235 + ... + 1026117.

Almost surely, 2^28222503408 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 28222503408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45184125888).

28222503408 is an abundant number, since it is smaller than the sum of its proper divisors (62145748368).

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

28222503408 is a wasteful number, since it uses less digits than its factorization.

28222503408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27985 (or 27970 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 28222503408 in words is "twenty-eight billion, two hundred twenty-two million, five hundred three thousand, four hundred eight".