1288648 has 16 divisors (see below), whose sum is σ = 2448000. Its totient is φ = 635856.

The previous prime is 1288643. The next prime is 1288649. The reversal of 1288648 is 8468821.

It is a super-2 number, since 2×1288648² = 3321227335808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288643) 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, 388 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (153000).

2^1288648 is an apocalyptic number.

It is an amenable number.

1288648 is a deficient number, since it is larger than the sum of its proper divisors (1159352).

1288648 is a wasteful number, since it uses less digits than its factorization.

1288648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 2120 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 1288648 is about 1135.1863283180. The cubic root of 1288648 is about 108.8206798205.

It can be divided in two parts, 1288 and 648, that added together give a square (1936 = 44²).

The spelling of 1288648 in words is "one million, two hundred eighty-eight thousand, six hundred forty-eight".