1090404090 has 24 divisors (see below), whose sum is σ = 2835050868. Its totient is φ = 290774400.

The previous prime is 1090404071. The next prime is 1090404101. The reversal of 1090404090 is 904040901.

It can be written as a sum of positive squares in 2 ways, for example, as 1070663841 + 19740249 = 32721^2 + 4443^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6057711 + ... + 6057890.

Almost surely, 2^1090404090 is an apocalyptic number.

1090404090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1090404090 is an abundant number, since it is smaller than the sum of its proper divisors (1744646778).

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

1090404090 is a wasteful number, since it uses less digits than its factorization.

1090404090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12115614 (or 12115611 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1090404090 is about 33021.2672379483. The cubic root of 1090404090 is about 1029.2696270606.

Adding to 1090404090 its reverse (904040901), we get a palindrome (1994444991).

The spelling of 1090404090 in words is "one billion, ninety million, four hundred four thousand, ninety".