1220928 has 28 divisors (see below), whose sum is σ = 3230880. Its totient is φ = 406912.

The previous prime is 1220927. The next prime is 1220953. The reversal of 1220928 is 8290221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1220898 and 1220907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2988 + ... + 3371.

2^1220928 is an apocalyptic number.

It is an amenable number.

1220928 is an abundant number, since it is smaller than the sum of its proper divisors (2009952).

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

1220928 is an equidigital number, since it uses as much as digits as its factorization.

1220928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374 (or 6364 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1220928 is about 1104.9561077256. The cubic root of 1220928 is about 106.8800589240.

The spelling of 1220928 in words is "one million, two hundred twenty thousand, nine hundred twenty-eight".