655619328 has 432 divisors, whose sum is σ = 2410611840. Its totient is φ = 166772736.

The previous prime is 655619299. The next prime is 655619353. The reversal of 655619328 is 823916556.

655619328 is a `hidden beast` number, since 6 + 5 + 5 + 619 + 3 + 28 = 666.

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 47 ways as a sum of consecutive naturals, for example, 11112163 + ... + 11112221.

It is an arithmetic number, because the mean of its divisors is an integer number (5580120).

Almost surely, 2^655619328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655619328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205305920).

655619328 is an abundant number, since it is smaller than the sum of its proper divisors (1754992512).

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

655619328 is a wasteful number, since it uses less digits than its factorization.

655619328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 137 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 655619328 is about 25605.0644990400. The cubic root of 655619328 is about 868.7281932452.

The spelling of 655619328 in words is "six hundred fifty-five million, six hundred nineteen thousand, three hundred twenty-eight".