22785641928 has 256 divisors, whose sum is σ = 76430592000. Its totient is φ = 6144221952.

The previous prime is 22785641867. The next prime is 22785641959. The reversal of 22785641928 is 82914658722.

22785641928 is a `hidden beast` number, since 2 + 2 + 78 + 564 + 1 + 9 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8415951 + ... + 8418657.

It is an arithmetic number, because the mean of its divisors is an integer number (298557000).

Almost surely, 2^22785641928 is an apocalyptic number.

22785641928 is a gapful number since it is divisible by the number (28) 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 22785641928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38215296000).

22785641928 is an abundant number, since it is smaller than the sum of its proper divisors (53644950072).

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

22785641928 is a wasteful number, since it uses less digits than its factorization.

22785641928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041 (or 3031 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 22785641928 in words is "twenty-two billion, seven hundred eighty-five million, six hundred forty-one thousand, nine hundred twenty-eight".