406635 has 8 divisors (see below), whose sum is σ = 650640. Its totient is φ = 216864.

The previous prime is 406633. The next prime is 406649. The reversal of 406635 is 536604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406635 - 2¹ = 406633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406631) 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, 13540 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (81330).

2⁴⁰⁶⁶³⁵ is an apocalyptic number.

406635 is a deficient number, since it is larger than the sum of its proper divisors (244005).

406635 is a wasteful number, since it uses less digits than its factorization.

406635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27117.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 406635 is about 637.6793865259. The cubic root of 406635 is about 74.0857904461.

The spelling of 406635 in words is "four hundred six thousand, six hundred thirty-five".