406581128 has 12 divisors (see below), whose sum is σ = 762446565. Its totient is φ = 203262048.

The previous prime is 406581113. The next prime is 406581139. The reversal of 406581128 is 821185604.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 399280324 + 7300804 = 19982^2 + 2702^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14258.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53468 + ... + 60596.

Almost surely, 2^406581128 is an apocalyptic number.

It is an amenable number.

406581128 is a deficient number, since it is larger than the sum of its proper divisors (355865437).

406581128 is an frugal number, since it uses more digits than its factorization.

406581128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14264 (or 7131 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 406581128 is about 20163.8569723156. The cubic root of 406581128 is about 740.8251861266.

The spelling of 406581128 in words is "four hundred six million, five hundred eighty-one thousand, one hundred twenty-eight".