4000305 has 8 divisors (see below), whose sum is σ = 6400512. Its totient is φ = 2133488.

The previous prime is 4000303. The next prime is 4000309. The reversal of 4000305 is 5030004.

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 4000305 - 2¹ = 4000303 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4000301) 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, 133329 + ... + 133358.

It is an arithmetic number, because the mean of its divisors is an integer number (800064).

Almost surely, 2^4000305 is an apocalyptic number.

It is an amenable number.

4000305 is a deficient number, since it is larger than the sum of its proper divisors (2400207).

4000305 is a wasteful number, since it uses less digits than its factorization.

4000305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266695.

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

The square root of 4000305 is about 2000.0762485465. The cubic root of 4000305 is about 158.7441397386.

Adding to 4000305 its reverse (5030004), we get a palindrome (9030309).

The spelling of 4000305 in words is "four million, three hundred five", and thus it is an aban number.