3040639 has 4 divisors (see below), whose sum is σ = 3475024. Its totient is φ = 2606256.

The previous prime is 3040633. The next prime is 3040649. The reversal of 3040639 is 9360403.

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

It is a cyclic number.

It is not a de Polignac number, because 3040639 - 2¹⁹ = 2516351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3040633) 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, 217182 + ... + 217195.

It is an arithmetic number, because the mean of its divisors is an integer number (868756).

Almost surely, 2^3040639 is an apocalyptic number.

3040639 is a deficient number, since it is larger than the sum of its proper divisors (434385).

3040639 is an equidigital number, since it uses as much as digits as its factorization.

3040639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434384.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 3040639 is about 1743.7428136053. The cubic root of 3040639 is about 144.8732781072.

The spelling of 3040639 in words is "three million, forty thousand, six hundred thirty-nine".