11916978 has 32 divisors (see below), whose sum is σ = 24639552. Its totient is φ = 3840000.

The previous prime is 11916973. The next prime is 11917001. The reversal of 11916978 is 87961911.

It is not an unprimeable number, because it can be changed into a prime (11916973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47353 + ... + 47603.

It is an arithmetic number, because the mean of its divisors is an integer number (769986).

Almost surely, 2^11916978 is an apocalyptic number.

11916978 is an abundant number, since it is smaller than the sum of its proper divisors (12722574).

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

11916978 is a wasteful number, since it uses less digits than its factorization.

11916978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its digits is 27216, while the sum is 42.

The square root of 11916978 is about 3452.0976231851. The cubic root of 11916978 is about 228.4136458324.

The spelling of 11916978 in words is "eleven million, nine hundred sixteen thousand, nine hundred seventy-eight".