1090028218 has 4 divisors (see below), whose sum is σ = 1635042330. Its totient is φ = 545014108.

The previous prime is 1090028209. The next prime is 1090028227. The reversal of 1090028218 is 8128200901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1090028209) and next prime (1090028227).

It can be written as a sum of positive squares in only one way, i.e., 998117649 + 91910569 = 31593^2 + 9587^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1090028218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272507053 + ... + 272507056.

Almost surely, 2^1090028218 is an apocalyptic number.

1090028218 is a deficient number, since it is larger than the sum of its proper divisors (545014112).

1090028218 is an equidigital number, since it uses as much as digits as its factorization.

1090028218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545014111.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1090028218 is about 33015.5753849604. The cubic root of 1090028218 is about 1029.1513473334.

The spelling of 1090028218 in words is "one billion, ninety million, twenty-eight thousand, two hundred eighteen".