220681290 has 64 divisors (see below), whose sum is σ = 538192512. Its totient is φ = 57907200.

The previous prime is 220681273. The next prime is 220681337. The reversal of 220681290 is 92186022.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 915570 + ... + 915810.

It is an arithmetic number, because the mean of its divisors is an integer number (8409258).

Almost surely, 2^220681290 is an apocalyptic number.

220681290 is an abundant number, since it is smaller than the sum of its proper divisors (317511222).

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

220681290 is a wasteful number, since it uses less digits than its factorization.

220681290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 220681290 is about 14855.3455025455. The cubic root of 220681290 is about 604.3035858900.

The spelling of 220681290 in words is "two hundred twenty million, six hundred eighty-one thousand, two hundred ninety".