220784040 has 48 divisors (see below), whose sum is σ = 717549300. Its totient is φ = 58875648.

The previous prime is 220784023. The next prime is 220784063. The reversal of 220784040 is 40487022.

It can be written as a sum of positive squares in 2 ways, for example, as 220166244 + 617796 = 14838^2 + 786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220783995 and 220784013.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 306285 + ... + 307004.

Almost surely, 2^220784040 is an apocalyptic number.

220784040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220784040 is an abundant number, since it is smaller than the sum of its proper divisors (496765260).

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

220784040 is a wasteful number, since it uses less digits than its factorization.

220784040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613306 (or 613299 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 220784040 is about 14858.8034511531. The cubic root of 220784040 is about 604.3973599765.

The spelling of 220784040 in words is "two hundred twenty million, seven hundred eighty-four thousand, forty".