11828509 has 16 divisors (see below), whose sum is σ = 15390720. Its totient is φ = 8814960.

The previous prime is 11828503. The next prime is 11828519. The reversal of 11828509 is 90582811.

It is not a de Polignac number, because 11828509 - 2⁵ = 11828477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11828503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1569 + ... + 5110.

It is an arithmetic number, because the mean of its divisors is an integer number (961920).

Almost surely, 2^11828509 is an apocalyptic number.

It is an amenable number.

11828509 is a deficient number, since it is larger than the sum of its proper divisors (3562211).

11828509 is a wasteful number, since it uses less digits than its factorization.

11828509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 11828509 is about 3439.2599494659. The cubic root of 11828509 is about 227.8470105804.

The spelling of 11828509 in words is "eleven million, eight hundred twenty-eight thousand, five hundred nine".