11956578 has 8 divisors (see below), whose sum is σ = 23913168. Its totient is φ = 3985524.

The previous prime is 11956577. The next prime is 11956583. The reversal of 11956578 is 87565911.

11956578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

11956578 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11956577) 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, 996376 + ... + 996387.

It is an arithmetic number, because the mean of its divisors is an integer number (2989146).

Almost surely, 2^11956578 is an apocalyptic number.

11956578 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.

11956578 is a wasteful number, since it uses less digits than its factorization.

11956578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992768.

The product of its digits is 75600, while the sum is 42.

The square root of 11956578 is about 3457.8285093394. The cubic root of 11956578 is about 228.6663715323. Note that the first 3 decimals are identical.

The spelling of 11956578 in words is "eleven million, nine hundred fifty-six thousand, five hundred seventy-eight".