11388609 has 12 divisors (see below), whose sum is σ = 16481556. Its totient is φ = 7577952.

The previous prime is 11388599. The next prime is 11388631. The reversal of 11388609 is 90688311.

11388609 is a `hidden beast` number, since 11 + 38 + 8 + 609 = 666.

11388609 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 10870209 = 720^2 + 3297^2 .

It is not a de Polignac number, because 11388609 - 2⁵ = 11388577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11388109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6139 + ... + 7775.

It is an arithmetic number, because the mean of its divisors is an integer number (1373463).

Almost surely, 2^11388609 is an apocalyptic number.

It is an amenable number.

11388609 is a deficient number, since it is larger than the sum of its proper divisors (5092947).

11388609 is a wasteful number, since it uses less digits than its factorization.

11388609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11388609 is about 3374.7013201171. The cubic root of 11388609 is about 224.9867251427.

The spelling of 11388609 in words is "eleven million, three hundred eighty-eight thousand, six hundred nine".