1284388 has 18 divisors (see below), whose sum is σ = 2615046. Its totient is φ = 550368.

The previous prime is 1284383. The next prime is 1284421. The reversal of 1284388 is 8834821.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 268324 = 1008^2 + 518^2 .

It is not an unprimeable number, because it can be changed into a prime (1284383) 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, 3081 + ... + 3472.

2^1284388 is an apocalyptic number.

It is an amenable number.

1284388 is an abundant number, since it is smaller than the sum of its proper divisors (1330658).

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

1284388 is a wasteful number, since it uses less digits than its factorization.

1284388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571 (or 6562 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 1284388 is about 1133.3084310990. The cubic root of 1284388 is about 108.7006346609.

The spelling of 1284388 in words is "one million, two hundred eighty-four thousand, three hundred eighty-eight".