11659638 has 8 divisors (see below), whose sum is σ = 23319288. Its totient is φ = 3886544.

The previous prime is 11659631. The next prime is 11659651. The reversal of 11659638 is 83695611.

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

11659638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 11659596 and 11659605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11659631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971631 + ... + 971642.

It is an arithmetic number, because the mean of its divisors is an integer number (2914911).

Almost surely, 2^11659638 is an apocalyptic number.

11659638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11659638 is a wasteful number, since it uses less digits than its factorization.

11659638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943278.

The product of its digits is 38880, while the sum is 39.

The square root of 11659638 is about 3414.6212088605. The cubic root of 11659638 is about 226.7575150055.

The spelling of 11659638 in words is "eleven million, six hundred fifty-nine thousand, six hundred thirty-eight".