655222880 has 48 divisors (see below), whose sum is σ = 1667043504. Its totient is φ = 241927680.

The previous prime is 655222879. The next prime is 655222889. The reversal of 655222880 is 88222556.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655222889) 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, 155426 + ... + 159585.

It is an arithmetic number, because the mean of its divisors is an integer number (34730073).

Almost surely, 2^655222880 is an apocalyptic number.

It is an amenable number.

655222880 is an abundant number, since it is smaller than the sum of its proper divisors (1011820624).

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

655222880 is a wasteful number, since it uses less digits than its factorization.

655222880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315039 (or 315031 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 655222880 is about 25597.3217349003. The cubic root of 655222880 is about 868.5530535042.

The spelling of 655222880 in words is "six hundred fifty-five million, two hundred twenty-two thousand, eight hundred eighty".