1288998 has 24 divisors (see below), whose sum is σ = 2940600. Its totient is φ = 406944.

The previous prime is 1288997. The next prime is 1289003. The reversal of 1288998 is 8998821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288993) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1543 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (122525).

2^1288998 is an apocalyptic number.

1288998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1288998 is an abundant number, since it is smaller than the sum of its proper divisors (1651602).

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

1288998 is a wasteful number, since it uses less digits than its factorization.

1288998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796 (or 3793 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1288998 is about 1135.3404775661. The cubic root of 1288998 is about 108.8305309178.

The spelling of 1288998 in words is "one million, two hundred eighty-eight thousand, nine hundred ninety-eight".