220782990 has 32 divisors (see below), whose sum is σ = 530284320. Its totient is φ = 58830464.

The previous prime is 220782979. The next prime is 220782997. The reversal of 220782990 is 99287022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220782997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 60292 + ... + 63848.

It is an arithmetic number, because the mean of its divisors is an integer number (16571385).

Almost surely, 2^220782990 is an apocalyptic number.

220782990 is an abundant number, since it is smaller than the sum of its proper divisors (309501330).

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

220782990 is a wasteful number, since it uses less digits than its factorization.

220782990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5636.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 220782990 is about 14858.7681185218. The cubic root of 220782990 is about 604.3964018484.

The spelling of 220782990 in words is "two hundred twenty million, seven hundred eighty-two thousand, nine hundred ninety".