11996978 has 8 divisors (see below), whose sum is σ = 20566272. Its totient is φ = 5141556.

The previous prime is 11996939. The next prime is 11996987. The reversal of 11996978 is 87969911.

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

It is a super-2 number, since 2×11996978² = 287854962264968, which contains 22 as substring.

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, 428450 + ... + 428477.

It is an arithmetic number, because the mean of its divisors is an integer number (2570784).

Almost surely, 2^11996978 is an apocalyptic number.

11996978 is a deficient number, since it is larger than the sum of its proper divisors (8569294).

11996978 is an equidigital number, since it uses as much as digits as its factorization.

11996978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856936.

The product of its digits is 244944, while the sum is 50.

The square root of 11996978 is about 3463.6653995442. The cubic root of 11996978 is about 228.9236284169.

The spelling of 11996978 in words is "eleven million, nine hundred ninety-six thousand, nine hundred seventy-eight".