220455760 has 40 divisors (see below), whose sum is σ = 585783936. Its totient is φ = 75584640.

The previous prime is 220455757. The next prime is 220455761. The reversal of 220455760 is 67554022.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220455761) 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 7 ways as a sum of consecutive naturals, for example, 196276 + ... + 197395.

Almost surely, 2^220455760 is an apocalyptic number.

220455760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220455760 is an abundant number, since it is smaller than the sum of its proper divisors (365328176).

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

220455760 is a wasteful number, since it uses less digits than its factorization.

220455760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393691 (or 393685 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 220455760 is about 14847.7526919059. The cubic root of 220455760 is about 604.0976553649.

The spelling of 220455760 in words is "two hundred twenty million, four hundred fifty-five thousand, seven hundred sixty".