1090688 has 16 divisors (see below), whose sum is σ = 2173110. Its totient is φ = 545280.

The previous prime is 1090681. The next prime is 1090697. The reversal of 1090688 is 8860901.

It can be written as a sum of positive squares in only one way, i.e., 937024 + 153664 = 968^2 + 392^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1090681) 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, 4133 + ... + 4388.

2^1090688 is an apocalyptic number.

It is an amenable number.

1090688 is a deficient number, since it is larger than the sum of its proper divisors (1082422).

1090688 is an frugal number, since it uses more digits than its factorization.

1090688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535 (or 8523 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1090688 is about 1044.3600911563. The cubic root of 1090688 is about 102.9358950087.

The spelling of 1090688 in words is "one million, ninety thousand, six hundred eighty-eight".