405618 has 16 divisors (see below), whose sum is σ = 824160. Its totient is φ = 133056.

The previous prime is 405611. The next prime is 405641. The reversal of 405618 is 816504.

It is not an unprimeable number, because it can be changed into a prime (405611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (51510).

2⁴⁰⁵⁶¹⁸ is an apocalyptic number.

405618 is an abundant number, since it is smaller than the sum of its proper divisors (418542).

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

405618 is a wasteful number, since it uses less digits than its factorization.

405618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 405618 is about 636.8814646384. The cubic root of 405618 is about 74.0239756741.

The spelling of 405618 in words is "four hundred five thousand, six hundred eighteen".