22017870728 has 16 divisors (see below), whose sum is σ = 47181151680. Its totient is φ = 9436230288.

The previous prime is 22017870727. The next prime is 22017870731. The reversal of 22017870728 is 82707871022.

It is not an unprimeable number, because it can be changed into a prime (22017870727) 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 3 ways as a sum of consecutive naturals, for example, 196588076 + ... + 196588187.

It is an arithmetic number, because the mean of its divisors is an integer number (2948821980).

Almost surely, 2^22017870728 is an apocalyptic number.

22017870728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22017870728 is an abundant number, since it is smaller than the sum of its proper divisors (25163280952).

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

22017870728 is a wasteful number, since it uses less digits than its factorization.

22017870728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393176276 (or 393176272 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 44.

The spelling of 22017870728 in words is "twenty-two billion, seventeen million, eight hundred seventy thousand, seven hundred twenty-eight".