1284328 has 8 divisors (see below), whose sum is σ = 2408130. Its totient is φ = 642160.

The previous prime is 1284317. The next prime is 1284329. The reversal of 1284328 is 8234821.

It can be written as a sum of positive squares in only one way, i.e., 1036324 + 248004 = 1018^2 + 498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1284296 and 1284305.

It is not an unprimeable number, because it can be changed into a prime (1284329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80263 + ... + 80278.

2^1284328 is an apocalyptic number.

It is an amenable number.

1284328 is a deficient number, since it is larger than the sum of its proper divisors (1123802).

1284328 is a wasteful number, since it uses less digits than its factorization.

1284328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160547 (or 160543 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 1284328 is about 1133.2819596199. The cubic root of 1284328 is about 108.6989419897.

The spelling of 1284328 in words is "one million, two hundred eighty-four thousand, three hundred twenty-eight".