408168128 has 28 divisors (see below), whose sum is σ = 810707040. Its totient is φ = 203895552.

The previous prime is 408168121. The next prime is 408168133. The reversal of 408168128 is 821861804.

It is a junction number, because it is equal to n+sod(n) for n = 408168091 and 408168100.

It is not an unprimeable number, because it can be changed into a prime (408168121) 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, 89225 + ... + 93687.

Almost surely, 2^408168128 is an apocalyptic number.

It is an amenable number.

408168128 is a deficient number, since it is larger than the sum of its proper divisors (402538912).

408168128 is a wasteful number, since it uses less digits than its factorization.

408168128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904 (or 5894 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 408168128 is about 20203.1712362193. The cubic root of 408168128 is about 741.7878174574.

The spelling of 408168128 in words is "four hundred eight million, one hundred sixty-eight thousand, one hundred twenty-eight".