655360220 has 12 divisors (see below), whose sum is σ = 1376256504. Its totient is φ = 262144080.

The previous prime is 655360219. The next prime is 655360253. The reversal of 655360220 is 22063556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16383986 + ... + 16384025.

It is an arithmetic number, because the mean of its divisors is an integer number (114688042).

Almost surely, 2^655360220 is an apocalyptic number.

It is an amenable number.

655360220 is an abundant number, since it is smaller than the sum of its proper divisors (720896284).

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

655360220 is a wasteful number, since it uses less digits than its factorization.

655360220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32768020 (or 32768018 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 655360220 is about 25600.0042968746. The cubic root of 655360220 is about 868.6137345063.

The spelling of 655360220 in words is "six hundred fifty-five million, three hundred sixty thousand, two hundred twenty".