220621078 has 8 divisors (see below), whose sum is σ = 333312840. Its totient is φ = 109516800.

The previous prime is 220621057. The next prime is 220621091. The reversal of 220621078 is 870126022.

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

It is a congruent number.

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, 396523 + ... + 397078.

It is an arithmetic number, because the mean of its divisors is an integer number (41664105).

Almost surely, 2^220621078 is an apocalyptic number.

220621078 is a deficient number, since it is larger than the sum of its proper divisors (112691762).

220621078 is a wasteful number, since it uses less digits than its factorization.

220621078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793742.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 220621078 is about 14853.3187537331. The cubic root of 220621078 is about 604.2486202919.

The spelling of 220621078 in words is "two hundred twenty million, six hundred twenty-one thousand, seventy-eight".