1090781904 has 40 divisors (see below), whose sum is σ = 2894016160. Its totient is φ = 353766528.

The previous prime is 1090781893. The next prime is 1090781947. The reversal of 1090781904 is 4091870901.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305314 + ... + 308865.

It is an arithmetic number, because the mean of its divisors is an integer number (72350404).

Almost surely, 2^1090781904 is an apocalyptic number.

It is an amenable number.

1090781904 is an abundant number, since it is smaller than the sum of its proper divisors (1803234256).

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

1090781904 is a wasteful number, since it uses less digits than its factorization.

1090781904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614227 (or 614221 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 1090781904 is about 33026.9875102166. The cubic root of 1090781904 is about 1029.3884905087.

The spelling of 1090781904 in words is "one billion, ninety million, seven hundred eighty-one thousand, nine hundred four".