11978816 has 28 divisors (see below), whose sum is σ = 25024080. Its totient is φ = 5673600.

The previous prime is 11978737. The next prime is 11978819. The reversal of 11978816 is 61887911.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (11978819) 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, 3710 + ... + 6141.

Almost surely, 2^11978816 is an apocalyptic number.

11978816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11978816 is an abundant number, since it is smaller than the sum of its proper divisors (13045264).

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

11978816 is an equidigital number, since it uses as much as digits as its factorization.

11978816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882 (or 9872 counting only the distinct ones).

The product of its digits is 24192, while the sum is 41.

The square root of 11978816 is about 3461.0426174781. The cubic root of 11978816 is about 228.8080490102.

The spelling of 11978816 in words is "eleven million, nine hundred seventy-eight thousand, eight hundred sixteen".