400560165 has 12 divisors (see below), whose sum is σ = 694304364. Its totient is φ = 213632064.

The previous prime is 400560163. The next prime is 400560169. The reversal of 400560165 is 561065004.

It is a happy number.

400560165 is a `hidden beast` number, since 40 + 0 + 560 + 1 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 302133924 + 98426241 = 17382^2 + 9921^2 .

It is not a de Polignac number, because 400560165 - 2¹ = 400560163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400560163) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4450624 + ... + 4450713.

It is an arithmetic number, because the mean of its divisors is an integer number (57858697).

Almost surely, 2^400560165 is an apocalyptic number.

400560165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400560165 is a deficient number, since it is larger than the sum of its proper divisors (293744199).

400560165 is a wasteful number, since it uses less digits than its factorization.

400560165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901348 (or 8901345 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 400560165 is about 20013.9992255421. Note that the first 3 decimals coincide. The cubic root of 400560165 is about 737.1500835490.

The spelling of 400560165 in words is "four hundred million, five hundred sixty thousand, one hundred sixty-five".