11878978 has 8 divisors (see below), whose sum is σ = 17843472. Its totient is φ = 5931156.

The previous prime is 11878973. The next prime is 11878991. The reversal of 11878978 is 87987811.

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

It is a super-2 number, since 2×11878978² = 282220236648968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11878973) 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, 2200 + ... + 5347.

It is an arithmetic number, because the mean of its divisors is an integer number (2230434).

Almost surely, 2^11878978 is an apocalyptic number.

11878978 is a deficient number, since it is larger than the sum of its proper divisors (5964494).

11878978 is an equidigital number, since it uses as much as digits as its factorization.

11878978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336.

The product of its digits is 225792, while the sum is 49.

The square root of 11878978 is about 3446.5893285972. The cubic root of 11878978 is about 228.1706043311.

The spelling of 11878978 in words is "eleven million, eight hundred seventy-eight thousand, nine hundred seventy-eight".