4540639 has 8 divisors (see below), whose sum is σ = 4800240. Its totient is φ = 4283136.

The previous prime is 4540633. The next prime is 4540651. The reversal of 4540639 is 9360454.

4540639 = 327² + 328² + ... + 364².

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 4540639 - 2⁵ = 4540607 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 5³ + 4¹¹ + 0 + 6⁷ + 3⁶ + 9 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4540639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540633) 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, 6369 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (600030).

Almost surely, 2^4540639 is an apocalyptic number.

4540639 is a deficient number, since it is larger than the sum of its proper divisors (259601).

4540639 is a wasteful number, since it uses less digits than its factorization.

4540639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 4540639 is about 2130.8775187701. The cubic root of 4540639 is about 165.5918627903.

The spelling of 4540639 in words is "four million, five hundred forty thousand, six hundred thirty-nine".