28333722240 has 512 divisors, whose sum is σ = 105025075200. Its totient is φ = 7300730880.

The previous prime is 28333722217. The next prime is 28333722247. The reversal of 28333722240 is 4222733382.

28333722240 is a `hidden beast` number, since 2 + 83 + 337 + 2 + 2 + 240 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 28333722195 and 28333722204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333722247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43389754 + ... + 43390406.

It is an arithmetic number, because the mean of its divisors is an integer number (205127100).

Almost surely, 2^28333722240 is an apocalyptic number.

28333722240 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 28333722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52512537600).

28333722240 is an abundant number, since it is smaller than the sum of its proper divisors (76691352960).

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

28333722240 is an frugal number, since it uses more digits than its factorization.

28333722240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 28333722240 in words is "twenty-eight billion, three hundred thirty-three million, seven hundred twenty-two thousand, two hundred forty".