405268 has 12 divisors (see below), whose sum is σ = 719712. Its totient is φ = 199640.

The previous prime is 405253. The next prime is 405269. The reversal of 405268 is 862504.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405269) by changing a digit.

405268 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2⁴⁰⁵²⁶⁸ is an apocalyptic number.

It is an amenable number.

405268 is a deficient number, since it is larger than the sum of its proper divisors (314444).

405268 is a wasteful number, since it uses less digits than its factorization.

405268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 405268 is about 636.6066289319. The cubic root of 405268 is about 74.0026782571.

The spelling of 405268 in words is "four hundred five thousand, two hundred sixty-eight".