1090816 has 18 divisors (see below), whose sum is σ = 2177882. Its totient is φ = 545280.

The previous prime is 1090807. The next prime is 1090819. The reversal of 1090816 is 6180901.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 9216 = 1040^2 + 96^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1875 + ... + 2386.

2^1090816 is an apocalyptic number.

1090816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1090816 is a deficient number, since it is larger than the sum of its proper divisors (1087066).

1090816 is an frugal number, since it uses more digits than its factorization.

1090816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277 (or 4263 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1090816 is about 1044.4213709035. The cubic root of 1090816 is about 102.9399216046.

The spelling of 1090816 in words is "one million, ninety thousand, eight hundred sixteen".