409868811 has 48 divisors (see below), whose sum is σ = 671224320. Its totient is φ = 238839360.

The previous prime is 409868783. The next prime is 409868831. The reversal of 409868811 is 118868904.

It is not a de Polignac number, because 409868811 - 2⁹ = 409868299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409868831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273781 + ... + 275273.

It is an arithmetic number, because the mean of its divisors is an integer number (13983840).

Almost surely, 2^409868811 is an apocalyptic number.

409868811 is a deficient number, since it is larger than the sum of its proper divisors (261355509).

409868811 is a wasteful number, since it uses less digits than its factorization.

409868811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 409868811 is about 20245.2169906870. The cubic root of 409868811 is about 742.8166401082.

The spelling of 409868811 in words is "four hundred nine million, eight hundred sixty-eight thousand, eight hundred eleven".