220919768 has 32 divisors (see below), whose sum is σ = 419420160. Its totient is φ = 109084320.

The previous prime is 220919753. The next prime is 220919771. The reversal of 220919768 is 867919022.

It is a happy number.

It is a super-3 number, since 3×220919768³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248621 + ... + 249507.

It is an arithmetic number, because the mean of its divisors is an integer number (13106880).

Almost surely, 2^220919768 is an apocalyptic number.

It is an amenable number.

220919768 is a deficient number, since it is larger than the sum of its proper divisors (198500392).

220919768 is a wasteful number, since it uses less digits than its factorization.

220919768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 220919768 is about 14863.3700081778. The cubic root of 220919768 is about 604.5211866209.

The spelling of 220919768 in words is "two hundred twenty million, nine hundred nineteen thousand, seven hundred sixty-eight".