11928609 has 36 divisors (see below), whose sum is σ = 21874320. Its totient is φ = 6194160.

The previous prime is 11928589. The next prime is 11928641. The reversal of 11928609 is 90682911.

It is not a de Polignac number, because 11928609 - 2⁸ = 11928353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11928649) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3622 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (607620).

Almost surely, 2^11928609 is an apocalyptic number.

It is an amenable number.

11928609 is a deficient number, since it is larger than the sum of its proper divisors (9945711).

11928609 is a wasteful number, since it uses less digits than its factorization.

11928609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 11928609 is about 3453.7818402441. The cubic root of 11928609 is about 228.4879324308.

It can be divided in two parts, 1192 and 8609, that added together give a square (9801 = 99²).

The spelling of 11928609 in words is "eleven million, nine hundred twenty-eight thousand, six hundred nine".