408889825 has 12 divisors (see below), whose sum is σ = 509959548. Its totient is φ = 325217600.

The previous prime is 408889813. The next prime is 408889829. The reversal of 408889825 is 528988804.

It can be written as a sum of positive squares in 6 ways, for example, as 6927424 + 401962401 = 2632^2 + 20049^2 .

It is not a de Polignac number, because 408889825 - 2⁷ = 408889697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408889829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42946 + ... + 51595.

It is an arithmetic number, because the mean of its divisors is an integer number (42496629).

Almost surely, 2^408889825 is an apocalyptic number.

It is an amenable number.

408889825 is a deficient number, since it is larger than the sum of its proper divisors (101069723).

408889825 is a wasteful number, since it uses less digits than its factorization.

408889825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94724 (or 94719 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The square root of 408889825 is about 20221.0243311263. The cubic root of 408889825 is about 742.2247540968.

The spelling of 408889825 in words is "four hundred eight million, eight hundred eighty-nine thousand, eight hundred twenty-five".