1288396 has 12 divisors (see below), whose sum is σ = 2387448. Its totient is φ = 606272.

The previous prime is 1288393. The next prime is 1288421. The reversal of 1288396 is 6938821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9406 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (198954).

2^1288396 is an apocalyptic number.

It is an amenable number.

1288396 is a deficient number, since it is larger than the sum of its proper divisors (1099052).

1288396 is a wasteful number, since it uses less digits than its factorization.

1288396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968 (or 18966 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 1288396 is about 1135.0753278968. The cubic root of 1288396 is about 108.8135859260.

The spelling of 1288396 in words is "one million, two hundred eighty-eight thousand, three hundred ninety-six".