1091820010 has 16 divisors (see below), whose sum is σ = 1966696200. Its totient is φ = 436412416.

The previous prime is 1091820001. The next prime is 1091820073. The reversal of 1091820010 is 100281901.

It can be written as a sum of positive squares in 4 ways, for example, as 195356529 + 896463481 = 13977^2 + 29941^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24655 + ... + 52834.

Almost surely, 2^1091820010 is an apocalyptic number.

1091820010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091820010 is a deficient number, since it is larger than the sum of its proper divisors (874876190).

1091820010 is a wasteful number, since it uses less digits than its factorization.

1091820010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78905.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1091820010 is about 33042.6997988966. The cubic root of 1091820010 is about 1029.7149460970.

The spelling of 1091820010 in words is "one billion, ninety-one million, eight hundred twenty thousand, ten".