1288944 has 30 divisors (see below), whose sum is σ = 3607656. Its totient is φ = 429600.

The previous prime is 1288939. The next prime is 1288951. The reversal of 1288944 is 4498821.

It is a super-2 number, since 2×1288944² = 3322753270272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1288899 and 1288908.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 4332 + ... + 4619.

2^1288944 is an apocalyptic number.

It is an amenable number.

1288944 is an abundant number, since it is smaller than the sum of its proper divisors (2318712).

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

1288944 is a wasteful number, since it uses less digits than its factorization.

1288944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965 (or 8956 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1288944 is about 1135.3166959047. The cubic root of 1288944 is about 108.8290111506.

The spelling of 1288944 in words is "one million, two hundred eighty-eight thousand, nine hundred forty-four".