655104240 has 320 divisors, whose sum is σ = 2650782720. Its totient is φ = 145566720.

The previous prime is 655104209. The next prime is 655104251. The reversal of 655104240 is 42401556.

655104240 is a `hidden beast` number, since 655 + 1 + 0 + 4 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 558855 + ... + 560025.

It is an arithmetic number, because the mean of its divisors is an integer number (8283696).

Almost surely, 2^655104240 is an apocalyptic number.

655104240 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 655104240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325391360).

655104240 is an abundant number, since it is smaller than the sum of its proper divisors (1995678480).

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

655104240 is a wasteful number, since it uses less digits than its factorization.

655104240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 655104240 is about 25595.0042000387. The cubic root of 655104240 is about 868.5006279060.

Adding to 655104240 its reverse (42401556), we get a palindrome (697505796).

The spelling of 655104240 in words is "six hundred fifty-five million, one hundred four thousand, two hundred forty".