11528639 has 4 divisors (see below), whose sum is σ = 11542920. Its totient is φ = 11514360.

The previous prime is 11528609. The next prime is 11528651. The reversal of 11528639 is 93682511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93682511 = 13 ⋅7206347.

It is a cyclic number.

It is not a de Polignac number, because 11528639 - 2¹⁶ = 11463103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11528599 and 11528608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11528609) 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, 5852 + ... + 7569.

It is an arithmetic number, because the mean of its divisors is an integer number (2885730).

Almost surely, 2^11528639 is an apocalyptic number.

11528639 is a deficient number, since it is larger than the sum of its proper divisors (14281).

11528639 is an equidigital number, since it uses as much as digits as its factorization.

11528639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14280.

The product of its digits is 12960, while the sum is 35.

The square root of 11528639 is about 3395.3849560838. The cubic root of 11528639 is about 225.9050884518.

It can be divided in two parts, 11528 and 639, that added together give a cube (12167 = 23³).

The spelling of 11528639 in words is "eleven million, five hundred twenty-eight thousand, six hundred thirty-nine".