406211865 has 8 divisors (see below), whose sum is σ = 649939008. Its totient is φ = 216646320.

The previous prime is 406211801. The next prime is 406211867. The reversal of 406211865 is 568112604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406211865 - 2⁶ = 406211801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406211867) 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 7 ways as a sum of consecutive naturals, for example, 13540381 + ... + 13540410.

It is an arithmetic number, because the mean of its divisors is an integer number (81242376).

Almost surely, 2^406211865 is an apocalyptic number.

It is an amenable number.

406211865 is a deficient number, since it is larger than the sum of its proper divisors (243727143).

406211865 is a wasteful number, since it uses less digits than its factorization.

406211865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27080799.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 406211865 is about 20154.6983356239. The cubic root of 406211865 is about 740.6008420613.

It can be divided in two parts, 40621 and 1865, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 406211865 in words is "four hundred six million, two hundred eleven thousand, eight hundred sixty-five".