22001028 has 24 divisors (see below), whose sum is σ = 58669632. Its totient is φ = 6285984.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001028 is 82010022.

It is a junction number, because it is equal to n+sod(n) for n = 22000998 and 22001016.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 130875 + ... + 131042.

It is an arithmetic number, because the mean of its divisors is an integer number (2444568).

Almost surely, 2^22001028 is an apocalyptic number.

22001028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22001028 is an abundant number, since it is smaller than the sum of its proper divisors (36668604).

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

22001028 is a wasteful number, since it uses less digits than its factorization.

22001028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261931 (or 261929 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 22001028 is about 4690.5253437115. The cubic root of 22001028 is about 280.2082973861.

The spelling of 22001028 in words is "twenty-two million, one thousand, twenty-eight".