2220978 has 16 divisors (see below), whose sum is σ = 4466880. Its totient is φ = 736176.

The previous prime is 2220973. The next prime is 2220979. The reversal of 2220978 is 8790222.

2220978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2220971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (279180).

2^2220978 is an apocalyptic number.

2220978 is an abundant number, since it is smaller than the sum of its proper divisors (2245902).

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

2220978 is a wasteful number, since it uses less digits than its factorization.

2220978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2220978 is about 1490.2946017483. The cubic root of 2220978 is about 130.4712286655.

The spelling of 2220978 in words is "two million, two hundred twenty thousand, nine hundred seventy-eight".