10809990 has 32 divisors (see below), whose sum is σ = 28827360. Its totient is φ = 2882592.

The previous prime is 10809961. The next prime is 10810001. The reversal of 10809990 is 9990801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19749 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (900855).

Almost surely, 2^10809990 is an apocalyptic number.

10809990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10809990 is an abundant number, since it is smaller than the sum of its proper divisors (18017370).

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

10809990 is a wasteful number, since it uses less digits than its factorization.

10809990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40053 (or 40047 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 10809990 is about 3287.8549238067. The cubic root of 10809990 is about 221.1100234976.

It can be divided in two parts, 10 and 809990, that added together give a 4-th power (810000 = 30⁴).

The spelling of 10809990 in words is "ten million, eight hundred nine thousand, nine hundred ninety".