1289828 has 12 divisors (see below), whose sum is σ = 2310000. Its totient is φ = 629832.

The previous prime is 1289803. The next prime is 1289831. The reversal of 1289828 is 8289821.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1289791 and 1289800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3578 + ... + 3921.

It is an arithmetic number, because the mean of its divisors is an integer number (192500).

2^1289828 is an apocalyptic number.

It is an amenable number.

1289828 is a deficient number, since it is larger than the sum of its proper divisors (1020172).

1289828 is a wasteful number, since it uses less digits than its factorization.

1289828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546 (or 7544 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The square root of 1289828 is about 1135.7059478580. The cubic root of 1289828 is about 108.8538849648.

The spelling of 1289828 in words is "one million, two hundred eighty-nine thousand, eight hundred twenty-eight".