408504861 has 24 divisors (see below), whose sum is σ = 608010936. Its totient is φ = 264176640.

The previous prime is 408504851. The next prime is 408504869. The reversal of 408504861 is 168405804.

It can be written as a sum of positive squares in 4 ways, for example, as 22382361 + 386122500 = 4731^2 + 19650^2 .

It is not a de Polignac number, because 408504861 - 2⁶ = 408504797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408504869) 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 23 ways as a sum of consecutive naturals, for example, 34981 + ... + 45173.

It is an arithmetic number, because the mean of its divisors is an integer number (25333789).

Almost surely, 2^408504861 is an apocalyptic number.

It is an amenable number.

408504861 is a deficient number, since it is larger than the sum of its proper divisors (199506075).

408504861 is a wasteful number, since it uses less digits than its factorization.

408504861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 408504861 is about 20211.5031850677. The cubic root of 408504861 is about 741.9917495807.

The spelling of 408504861 in words is "four hundred eight million, five hundred four thousand, eight hundred sixty-one".