4000340 has 12 divisors (see below), whose sum is σ = 8400756. Its totient is φ = 1600128.

The previous prime is 4000309. The next prime is 4000343. The reversal of 4000340 is 430004.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 3161284 = 916^2 + 1778^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000343) 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, 99989 + ... + 100028.

It is an arithmetic number, because the mean of its divisors is an integer number (700063).

Almost surely, 2^4000340 is an apocalyptic number.

It is an amenable number.

4000340 is an abundant number, since it is smaller than the sum of its proper divisors (4400416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4000340 is a wasteful number, since it uses less digits than its factorization.

4000340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200026 (or 200024 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 4000340 is about 2000.0849981938. The cubic root of 4000340 is about 158.7446027057.

Adding to 4000340 its reverse (430004), we get a palindrome (4430344).

The spelling of 4000340 in words is "four million, three hundred forty", and thus it is an aban number.