1288836 has 18 divisors (see below), whose sum is σ = 3257982. Its totient is φ = 429600.

The previous prime is 1288831. The next prime is 1288843. The reversal of 1288836 is 6388821.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 367236 = 960^2 + 606^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1288836² = 3322196469792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35801 = 1288836 / (1 + 2 + 8 + 8 + 8 + 3 + 6).

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1288836.

It is not an unprimeable number, because it can be changed into a prime (1288831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17865 + ... + 17936.

It is an arithmetic number, because the mean of its divisors is an integer number (180999).

2^1288836 is an apocalyptic number.

It is an amenable number.

1288836 is an abundant number, since it is smaller than the sum of its proper divisors (1969146).

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

1288836 is a wasteful number, since it uses less digits than its factorization.

1288836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35811 (or 35806 counting only the distinct ones).

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

The square root of 1288836 is about 1135.2691310874. The cubic root of 1288836 is about 108.8259714888.

The spelling of 1288836 in words is "one million, two hundred eighty-eight thousand, eight hundred thirty-six".