16805940 has 24 divisors (see below), whose sum is σ = 47056800. Its totient is φ = 4481568.

The previous prime is 16805933. The next prime is 16805953. The reversal of 16805940 is 4950861.

16805940 is a modest number, since divided by 5940 gives 1680 as remainder.

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, 139990 + ... + 140109.

It is an arithmetic number, because the mean of its divisors is an integer number (1960700).

Almost surely, 2^16805940 is an apocalyptic number.

16805940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16805940 is an abundant number, since it is smaller than the sum of its proper divisors (30250860).

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

16805940 is a wasteful number, since it uses less digits than its factorization.

16805940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280111 (or 280109 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16805940 is about 4099.5048481493. The cubic root of 16805940 is about 256.1460145210.

The spelling of 16805940 in words is "sixteen million, eight hundred five thousand, nine hundred forty".