11640605 has 8 divisors (see below), whose sum is σ = 13987512. Its totient is φ = 9299968.

The previous prime is 11640583. The next prime is 11640611. The reversal of 11640605 is 50604611.

It can be written as a sum of positive squares in 4 ways, for example, as 2172676 + 9467929 = 1474^2 + 3077^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11640605 - 2¹⁰ = 11639581 is a prime.

It is a super-3 number, since 3×11640605³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (1748439).

Almost surely, 2^11640605 is an apocalyptic number.

It is an amenable number.

11640605 is a deficient number, since it is larger than the sum of its proper divisors (2346907).

11640605 is a wasteful number, since it uses less digits than its factorization.

11640605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 11640605 is about 3411.8330850146. The cubic root of 11640605 is about 226.6340627364.

The spelling of 11640605 in words is "eleven million, six hundred forty thousand, six hundred five".