408940161 has 16 divisors (see below), whose sum is σ = 650241024. Its totient is φ = 223519824.

The previous prime is 408940159. The next prime is 408940171. The reversal of 408940161 is 161049804.

It is not a de Polignac number, because 408940161 - 2¹ = 408940159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408940141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422851 + ... + 423816.

It is an arithmetic number, because the mean of its divisors is an integer number (40640064).

Almost surely, 2^408940161 is an apocalyptic number.

It is an amenable number.

408940161 is a deficient number, since it is larger than the sum of its proper divisors (241300863).

408940161 is a wasteful number, since it uses less digits than its factorization.

408940161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846700.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 408940161 is about 20222.2689379802. The cubic root of 408940161 is about 742.2552098088.

Adding to 408940161 its reverse (161049804), we get a palindrome (569989965).

The spelling of 408940161 in words is "four hundred eight million, nine hundred forty thousand, one hundred sixty-one".