11528909 has 8 divisors (see below), whose sum is σ = 13362048. Its totient is φ = 9742320.

The previous prime is 11528897. The next prime is 11528927. The reversal of 11528909 is 90982511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11528909 - 2⁸ = 11528653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11528969) 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, 11102 + ... + 12095.

It is an arithmetic number, because the mean of its divisors is an integer number (1670256).

Almost surely, 2^11528909 is an apocalyptic number.

It is an amenable number.

11528909 is a deficient number, since it is larger than the sum of its proper divisors (1833139).

11528909 is an equidigital number, since it uses as much as digits as its factorization.

11528909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23275.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 11528909 is about 3395.4247157020. The cubic root of 11528909 is about 225.9068519990.

The spelling of 11528909 in words is "eleven million, five hundred twenty-eight thousand, nine hundred nine".