1288308 has 48 divisors (see below), whose sum is σ = 3516800. Its totient is φ = 366912.

The previous prime is 1288307. The next prime is 1288337. The reversal of 1288308 is 8038821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3960 + ... + 4272.

2^1288308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758400).

1288308 is an abundant number, since it is smaller than the sum of its proper divisors (2228492).

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

1288308 is a wasteful number, since it uses less digits than its factorization.

1288308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 1288308 is about 1135.0365632877. The cubic root of 1288308 is about 108.8111084751.

It can be divided in two parts, 1288 and 308, that added together give a triangular number (1596 = T₅₆).

The spelling of 1288308 in words is "one million, two hundred eighty-eight thousand, three hundred eight".