220724440 has 16 divisors (see below), whose sum is σ = 496630080. Its totient is φ = 88289760.

The previous prime is 220724437. The next prime is 220724459. The reversal of 220724440 is 44427022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2759016 + ... + 2759095.

It is an arithmetic number, because the mean of its divisors is an integer number (31039380).

Almost surely, 2^220724440 is an apocalyptic number.

220724440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220724440 is an abundant number, since it is smaller than the sum of its proper divisors (275905640).

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

220724440 is a wasteful number, since it uses less digits than its factorization.

220724440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518122 (or 5518118 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 220724440 is about 14856.7977707176. The cubic root of 220724440 is about 604.3429699876.

The spelling of 220724440 in words is "two hundred twenty million, seven hundred twenty-four thousand, four hundred forty".