4220978 has 8 divisors (see below), whose sum is σ = 6438960. Its totient is φ = 2074660.

The previous prime is 4220977. The next prime is 4220987. The reversal of 4220978 is 8790224.

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

It is not an unprimeable number, because it can be changed into a prime (4220971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17768 + ... + 18003.

It is an arithmetic number, because the mean of its divisors is an integer number (804870).

Almost surely, 2^4220978 is an apocalyptic number.

4220978 is a deficient number, since it is larger than the sum of its proper divisors (2217982).

4220978 is a wasteful number, since it uses less digits than its factorization.

4220978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35832.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 4220978 is about 2054.5018861028. The cubic root of 4220978 is about 161.6110416678.

The spelling of 4220978 in words is "four million, two hundred twenty thousand, nine hundred seventy-eight".