220545890 has 8 divisors (see below), whose sum is σ = 396982620. Its totient is φ = 88218352.

The previous prime is 220545889. The next prime is 220545931. The reversal of 220545890 is 98545022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 214007641 + 6538249 = 14629^2 + 2557^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 220545890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11027285 + ... + 11027304.

Almost surely, 2^220545890 is an apocalyptic number.

220545890 is a deficient number, since it is larger than the sum of its proper divisors (176436730).

220545890 is a wasteful number, since it uses less digits than its factorization.

220545890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22054596.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 220545890 is about 14850.7875212057. The cubic root of 220545890 is about 604.1799695419.

The spelling of 220545890 in words is "two hundred twenty million, five hundred forty-five thousand, eight hundred ninety".