28222593840 has 480 divisors, whose sum is σ = 111280306176. Its totient is φ = 6276372480.

The previous prime is 28222593803. The next prime is 28222593869. The reversal of 28222593840 is 4839522282.

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

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, 67036830 + ... + 67037250.

Almost surely, 2^28222593840 is an apocalyptic number.

28222593840 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 28222593840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55640153088).

28222593840 is an abundant number, since it is smaller than the sum of its proper divisors (83057712336).

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

28222593840 is a wasteful number, since it uses less digits than its factorization.

28222593840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 28222593840 in words is "twenty-eight billion, two hundred twenty-two million, five hundred ninety-three thousand, eight hundred forty".