11947776 has 72 divisors (see below), whose sum is σ = 32573184. Its totient is φ = 3886080.

The previous prime is 11947763. The next prime is 11947777. The reversal of 11947776 is 67774911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11947777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35931 + ... + 36261.

Almost surely, 2^11947776 is an apocalyptic number.

11947776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11947776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16286592).

11947776 is an abundant number, since it is smaller than the sum of its proper divisors (20625408).

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

11947776 is an equidigital number, since it uses as much as digits as its factorization.

11947776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 383 counting only the distinct ones).

The product of its digits is 74088, while the sum is 42.

The square root of 11947776 is about 3456.5555109097. Note that the first 4 decimals coincide. The cubic root of 11947776 is about 228.6102457884.

It can be divided in two parts, 119 and 47776, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 11947776 in words is "eleven million, nine hundred forty-seven thousand, seven hundred seventy-six".