1219728 has 20 divisors (see below), whose sum is σ = 3151088. Its totient is φ = 406560.

The previous prime is 1219727. The next prime is 1219739. The reversal of 1219728 is 8279121.

It is a junction number, because it is equal to n+sod(n) for n = 1219695 and 1219704.

It is not an unprimeable number, because it can be changed into a prime (1219721) 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, 12658 + ... + 12753.

2^1219728 is an apocalyptic number.

It is an amenable number.

1219728 is an abundant number, since it is smaller than the sum of its proper divisors (1931360).

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

1219728 is a wasteful number, since it uses less digits than its factorization.

1219728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25422 (or 25416 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 1219728 is about 1104.4129662404. The cubic root of 1219728 is about 106.8450314387.

The spelling of 1219728 in words is "one million, two hundred nineteen thousand, seven hundred twenty-eight".