1288188 has 36 divisors (see below), whose sum is σ = 3553368. Its totient is φ = 390240.

The previous prime is 1288187. The next prime is 1288193. The reversal of 1288188 is 8818821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231 + ... + 2022.

2^1288188 is an apocalyptic number.

1288188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1288188 is an abundant number, since it is smaller than the sum of its proper divisors (2265180).

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

1288188 is a wasteful number, since it uses less digits than its factorization.

1288188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274 (or 3269 counting only the distinct ones).

The product of its digits is 8192, while the sum is 36.

The square root of 1288188 is about 1134.9837003235. The cubic root of 1288188 is about 108.8077299511.

The spelling of 1288188 in words is "one million, two hundred eighty-eight thousand, one hundred eighty-eight".