1263808 has 84 divisors (see below), whose sum is σ = 3243072. Its totient is φ = 483840.

The previous prime is 1263803. The next prime is 1263817. The reversal of 1263808 is 8083621.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1263803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40753 + ... + 40783.

It is an arithmetic number, because the mean of its divisors is an integer number (38608).

2^1263808 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 1263808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621536).

1263808 is an abundant number, since it is smaller than the sum of its proper divisors (1979264).

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

1263808 is a wasteful number, since it uses less digits than its factorization.

1263808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1263808 is about 1124.1921543935. The cubic root of 1263808 is about 108.1169286857.

The spelling of 1263808 in words is "one million, two hundred sixty-three thousand, eight hundred eight".