408435641 has 4 divisors (see below), whose sum is σ = 408486372. Its totient is φ = 408384912.

The previous prime is 408435631. The next prime is 408435653. The reversal of 408435641 is 146534804.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 148742416 + 259693225 = 12196^2 + 16115^2 .

It is a cyclic number.

It is not a de Polignac number, because 408435641 - 2²² = 404241337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408435611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10310 + ... + 30383.

It is an arithmetic number, because the mean of its divisors is an integer number (102121593).

Almost surely, 2^408435641 is an apocalyptic number.

It is an amenable number.

408435641 is a deficient number, since it is larger than the sum of its proper divisors (50731).

408435641 is a wasteful number, since it uses less digits than its factorization.

408435641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50730.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 408435641 is about 20209.7907213311. The cubic root of 408435641 is about 741.9498377415.

The spelling of 408435641 in words is "four hundred eight million, four hundred thirty-five thousand, six hundred forty-one".