655005240 has 384 divisors, whose sum is σ = 2446329600. Its totient is φ = 150958080.

The previous prime is 655005203. The next prime is 655005269. The reversal of 655005240 is 42500556.

655005240 is a `hidden beast` number, since 655 + 0 + 0 + 5 + 2 + 4 + 0 = 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 95 ways as a sum of consecutive naturals, for example, 4999975 + ... + 5000105.

It is an arithmetic number, because the mean of its divisors is an integer number (6370650).

Almost surely, 2^655005240 is an apocalyptic number.

655005240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655005240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223164800).

655005240 is an abundant number, since it is smaller than the sum of its proper divisors (1791324360).

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

655005240 is a wasteful number, since it uses less digits than its factorization.

655005240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 655005240 is about 25593.0701558058. The cubic root of 655005240 is about 868.4568761444.

Adding to 655005240 its reverse (42500556), we get a palindrome (697505796).

The spelling of 655005240 in words is "six hundred fifty-five million, five thousand, two hundred forty".