11856538 has 8 divisors (see below), whose sum is σ = 17846388. Its totient is φ = 5907744.

The previous prime is 11856517. The next prime is 11856541. The reversal of 11856538 is 83565811.

It can be written as a sum of positive squares in 2 ways, for example, as 10909809 + 946729 = 3303^2 + 973^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11856497 and 11856506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9531 + ... + 10702.

Almost surely, 2^11856538 is an apocalyptic number.

11856538 is a deficient number, since it is larger than the sum of its proper divisors (5989850).

11856538 is a wasteful number, since it uses less digits than its factorization.

11856538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20528.

The product of its digits is 28800, while the sum is 37.

The square root of 11856538 is about 3443.3323975475. The cubic root of 11856538 is about 228.0268384329.

The spelling of 11856538 in words is "eleven million, eight hundred fifty-six thousand, five hundred thirty-eight".