1019808 has 36 divisors (see below), whose sum is σ = 2900898. Its totient is φ = 339840.

The previous prime is 1019801. The next prime is 1019819. The reversal of 1019808 is 8089101.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 121104 = 948^2 + 348^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1019801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1483 + ... + 2058.

2^1019808 is an apocalyptic number.

1019808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1019808 is an abundant number, since it is smaller than the sum of its proper divisors (1881090).

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

1019808 is a wasteful number, since it uses less digits than its factorization.

1019808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557 (or 3546 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1019808 is about 1009.8554351985. The cubic root of 1019808 is about 100.6559544956.

The spelling of 1019808 in words is "one million, nineteen thousand, eight hundred eight".