1089940836 has 24 divisors (see below), whose sum is σ = 2653769664. Its totient is φ = 347517280.

The previous prime is 1089940769. The next prime is 1089940837. The reversal of 1089940836 is 6380499801.

It is not an unprimeable number, because it can be changed into a prime (1089940837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974255 + ... + 1974806.

It is an arithmetic number, because the mean of its divisors is an integer number (110573736).

Almost surely, 2^1089940836 is an apocalyptic number.

It is an amenable number.

1089940836 is an abundant number, since it is smaller than the sum of its proper divisors (1563828828).

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

1089940836 is a wasteful number, since it uses less digits than its factorization.

1089940836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949091 (or 3949089 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1089940836 is about 33014.2520133351. The cubic root of 1089940836 is about 1029.1238459946.

The spelling of 1089940836 in words is "one billion, eighty-nine million, nine hundred forty thousand, eight hundred thirty-six".