22321028 has 6 divisors (see below), whose sum is σ = 39061806. Its totient is φ = 11160512.

The previous prime is 22321021. The next prime is 22321043. The reversal of 22321028 is 82012322.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 61504 = 4718^2 + 248^2 .

It is a super-3 number, since 3×22321028³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22321021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2790125 + ... + 2790132.

It is an arithmetic number, because the mean of its divisors is an integer number (6510301).

Almost surely, 2^22321028 is an apocalyptic number.

It is an amenable number.

22321028 is a deficient number, since it is larger than the sum of its proper divisors (16740778).

22321028 is a wasteful number, since it uses less digits than its factorization.

22321028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580261 (or 5580259 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22321028 is about 4724.5135199299. The cubic root of 22321028 is about 281.5602858347.

It can be divided in two parts, 223210 and 28, that multiplied together give a triangular number (6249880 = T₃₅₃₅).

The spelling of 22321028 in words is "twenty-two million, three hundred twenty-one thousand, twenty-eight".