408609825 has 24 divisors (see below), whose sum is σ = 727536768. Its totient is φ = 201161280.

The previous prime is 408609823. The next prime is 408609847. The reversal of 408609825 is 528906804.

It is not a de Polignac number, because 408609825 - 2¹ = 408609823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408609823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208569 + ... + 210518.

It is an arithmetic number, because the mean of its divisors is an integer number (30314032).

Almost surely, 2^408609825 is an apocalyptic number.

It is an amenable number.

408609825 is a deficient number, since it is larger than the sum of its proper divisors (318926943).

408609825 is a wasteful number, since it uses less digits than its factorization.

408609825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419113 (or 419108 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 408609825 is about 20214.0996584068. The cubic root of 408609825 is about 742.0552949302.

The spelling of 408609825 in words is "four hundred eight million, six hundred nine thousand, eight hundred twenty-five".