400305 has 8 divisors (see below), whose sum is σ = 640512. Its totient is φ = 213488.

The previous prime is 400297. The next prime is 400307. The reversal of 400305 is 503004.

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

It is a cyclic number.

It is not a de Polignac number, because 400305 - 2³ = 400297 is a prime.

400305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (400307) 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, 13329 + ... + 13358.

It is an arithmetic number, because the mean of its divisors is an integer number (80064).

2⁴⁰⁰³⁰⁵ is an apocalyptic number.

It is an amenable number.

400305 is a deficient number, since it is larger than the sum of its proper divisors (240207).

400305 is a wasteful number, since it uses less digits than its factorization.

400305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26695.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 400305 is about 632.6966097586. The cubic root of 400305 is about 73.6993523751.

Adding to 400305 its reverse (503004), we get a palindrome (903309).

The spelling of 400305 in words is "four hundred thousand, three hundred five".