22180028 has 24 divisors (see below), whose sum is σ = 42380688. Its totient is φ = 10094976.

The previous prime is 22180013. The next prime is 22180031. The reversal of 22180028 is 82008122.

It is a junction number, because it is equal to n+sod(n) for n = 22179985 and 22180012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (1765862).

Almost surely, 2^22180028 is an apocalyptic number.

It is an amenable number.

22180028 is a deficient number, since it is larger than the sum of its proper divisors (20200660).

22180028 is a wasteful number, since it uses less digits than its factorization.

22180028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5933 (or 5931 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 22180028 is about 4709.5677083996. The cubic root of 22180028 is about 280.9661691012.

The spelling of 22180028 in words is "twenty-two million, one hundred eighty thousand, twenty-eight".