9028639 has 4 divisors (see below), whose sum is σ = 9040360. Its totient is φ = 9016920.

The previous prime is 9028637. The next prime is 9028699. The reversal of 9028639 is 9368209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9368209 = 823 ⋅11383.

It is a cyclic number.

It is not a de Polignac number, because 9028639 - 2¹ = 9028637 is a prime.

It is a Duffinian number.

9028639 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9028598 and 9028607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9028631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4617 + ... + 6274.

It is an arithmetic number, because the mean of its divisors is an integer number (2260090).

Almost surely, 2^9028639 is an apocalyptic number.

9028639 is a deficient number, since it is larger than the sum of its proper divisors (11721).

9028639 is a wasteful number, since it uses less digits than its factorization.

9028639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11720.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 9028639 is about 3004.7693755095. The cubic root of 9028639 is about 208.2287839509.

The spelling of 9028639 in words is "nine million, twenty-eight thousand, six hundred thirty-nine".