11220978 has 8 divisors (see below), whose sum is σ = 22441968. Its totient is φ = 3740324.

The previous prime is 11220931. The next prime is 11220991. The reversal of 11220978 is 87902211.

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

11220978 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935076 + ... + 935087.

It is an arithmetic number, because the mean of its divisors is an integer number (2805246).

Almost surely, 2^11220978 is an apocalyptic number.

11220978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11220978 is a wasteful number, since it uses less digits than its factorization.

11220978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870168.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 11220978 is about 3349.7728281183. The cubic root of 11220978 is about 223.8773909151.

The spelling of 11220978 in words is "eleven million, two hundred twenty thousand, nine hundred seventy-eight".