655430780 has 24 divisors (see below), whose sum is σ = 1378466208. Its totient is φ = 261779648.

The previous prime is 655430779. The next prime is 655430813. The reversal of 655430780 is 87034556.

655430780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 10664 + ... + 37743.

It is an arithmetic number, because the mean of its divisors is an integer number (57436092).

Almost surely, 2^655430780 is an apocalyptic number.

It is an amenable number.

655430780 is an abundant number, since it is smaller than the sum of its proper divisors (723035428).

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

655430780 is a wasteful number, since it uses less digits than its factorization.

655430780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49093 (or 49091 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 655430780 is about 25601.3823845510. The cubic root of 655430780 is about 868.6449067704.

The spelling of 655430780 in words is "six hundred fifty-five million, four hundred thirty thousand, seven hundred eighty".