405561128 has 32 divisors (see below), whose sum is σ = 871233600. Its totient is φ = 173377152.

The previous prime is 405561097. The next prime is 405561173. The reversal of 405561128 is 821165504.

It is a junction number, because it is equal to n+sod(n) for n = 405561094 and 405561103.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14051 + ... + 31757.

It is an arithmetic number, because the mean of its divisors is an integer number (27226050).

Almost surely, 2^405561128 is an apocalyptic number.

It is an amenable number.

405561128 is an abundant number, since it is smaller than the sum of its proper divisors (465672472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405561128 is a wasteful number, since it uses less digits than its factorization.

405561128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18129 (or 18125 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 405561128 is about 20138.5483091508. The cubic root of 405561128 is about 740.2051586021.

The spelling of 405561128 in words is "four hundred five million, five hundred sixty-one thousand, one hundred twenty-eight".