1222928 has 40 divisors (see below), whose sum is σ = 2767680. Its totient is φ = 512640.

The previous prime is 1222913. The next prime is 1222931. The reversal of 1222928 is 8292221.

It is a junction number, because it is equal to n+sod(n) for n = 1222897 and 1222906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6743 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (69192).

2^1222928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383840).

1222928 is an abundant number, since it is smaller than the sum of its proper divisors (1544752).

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

1222928 is a wasteful number, since it uses less digits than its factorization.

1222928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1222928 is about 1105.8607507277. The cubic root of 1222928 is about 106.9383870984.

The spelling of 1222928 in words is "one million, two hundred twenty-two thousand, nine hundred twenty-eight".