220289778 has 24 divisors (see below), whose sum is σ = 477773868. Its totient is φ = 73356192.

The previous prime is 220289777. The next prime is 220289779. The reversal of 220289778 is 877982022.

It is a happy number.

220289778 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220289777) and next prime (220289779).

It can be written as a sum of positive squares in 2 ways, for example, as 212488929 + 7800849 = 14577^2 + 2793^2 .

It is not an unprimeable number, because it can be changed into a prime (220289777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14076 + ... + 25272.

Almost surely, 2^220289778 is an apocalyptic number.

220289778 is an abundant number, since it is smaller than the sum of its proper divisors (257484090).

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

220289778 is a wasteful number, since it uses less digits than its factorization.

220289778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12298 (or 12295 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 220289778 is about 14842.1621740230. The cubic root of 220289778 is about 603.9460081411.

The spelling of 220289778 in words is "two hundred twenty million, two hundred eighty-nine thousand, seven hundred seventy-eight".