4000306 has 4 divisors (see below), whose sum is σ = 6000462. Its totient is φ = 2000152.

The previous prime is 4000303. The next prime is 4000309. The reversal of 4000306 is 6030004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4000303) and next prime (4000309).

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 1625625 = 1541^2 + 1275^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 1000075 + ... + 1000078.

Almost surely, 2^4000306 is an apocalyptic number.

4000306 is a deficient number, since it is larger than the sum of its proper divisors (2000156).

4000306 is a wasteful number, since it uses less digits than its factorization.

4000306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000155.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 4000306 is about 2000.0764985370. The cubic root of 4000306 is about 158.7441529663.

The spelling of 4000306 in words is "four million, three hundred six", and thus it is an aban number.