1288738 has 8 divisors (see below), whose sum is σ = 2108880. Its totient is φ = 585780.

The previous prime is 1288733. The next prime is 1288769. The reversal of 1288738 is 8378821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1288697 and 1288706.

It is not an unprimeable number, because it can be changed into a prime (1288733) 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, 29268 + ... + 29311.

It is an arithmetic number, because the mean of its divisors is an integer number (263610).

2^1288738 is an apocalyptic number.

1288738 is a deficient number, since it is larger than the sum of its proper divisors (820142).

1288738 is a wasteful number, since it uses less digits than its factorization.

1288738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58592.

The product of its digits is 21504, while the sum is 37.

The square root of 1288738 is about 1135.2259686952. The cubic root of 1288738 is about 108.8232131302.

It can be divided in two parts, 128873 and 8, that added together give a square (128881 = 359²).

The spelling of 1288738 in words is "one million, two hundred eighty-eight thousand, seven hundred thirty-eight".