4000289 has 4 divisors (see below), whose sum is σ = 4138260. Its totient is φ = 3862320.

The previous prime is 4000277. The next prime is 4000291. The reversal of 4000289 is 9820004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2131600 + 1868689 = 1460^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000289 - 2⁴ = 4000273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4000189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68942 + ... + 68999.

It is an arithmetic number, because the mean of its divisors is an integer number (1034565).

Almost surely, 2^4000289 is an apocalyptic number.

It is an amenable number.

4000289 is a deficient number, since it is larger than the sum of its proper divisors (137971).

4000289 is a wasteful number, since it uses less digits than its factorization.

4000289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137970.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 4000289 is about 2000.0722486950. The cubic root of 4000289 is about 158.7439280956.

The spelling of 4000289 in words is "four million, two hundred eighty-nine", and thus it is an aban number.