1288328 has 16 divisors (see below), whose sum is σ = 2557980. Its totient is φ = 606208.

The previous prime is 1288307. The next prime is 1288337. The reversal of 1288328 is 8238821.

It can be written as a sum of positive squares in 2 ways, for example, as 1036324 + 252004 = 1018^2 + 502^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1288294 and 1288303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4601 + ... + 4872.

2^1288328 is an apocalyptic number.

It is an amenable number.

1288328 is a deficient number, since it is larger than the sum of its proper divisors (1269652).

1288328 is a wasteful number, since it uses less digits than its factorization.

1288328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496 (or 9492 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 1288328 is about 1135.0453735424. The cubic root of 1288328 is about 108.8116715420.

The spelling of 1288328 in words is "one million, two hundred eighty-eight thousand, three hundred twenty-eight".