655440860 has 12 divisors (see below), whose sum is σ = 1376425848. Its totient is φ = 262176336.

The previous prime is 655440847. The next prime is 655440881. The reversal of 655440860 is 68044556.

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, 16386002 + ... + 16386041.

It is an arithmetic number, because the mean of its divisors is an integer number (114702154).

Almost surely, 2^655440860 is an apocalyptic number.

It is an amenable number.

655440860 is an abundant number, since it is smaller than the sum of its proper divisors (720984988).

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

655440860 is a wasteful number, since it uses less digits than its factorization.

655440860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32772052 (or 32772050 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 655440860 is about 25601.5792481636. The cubic root of 655440860 is about 868.6493597684.

The spelling of 655440860 in words is "six hundred fifty-five million, four hundred forty thousand, eight hundred sixty".