655298280 has 384 divisors, whose sum is σ = 2663781120. Its totient is φ = 136028160.

The previous prime is 655298251. The next prime is 655298291. The reversal of 655298280 is 82892556.

655298280 is a `hidden beast` number, since 6 + 552 + 98 + 2 + 8 + 0 = 666.

655298280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2718960 + ... + 2719200.

It is an arithmetic number, because the mean of its divisors is an integer number (6936930).

Almost surely, 2^655298280 is an apocalyptic number.

655298280 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 655298280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331890560).

655298280 is an abundant number, since it is smaller than the sum of its proper divisors (2008482840).

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

655298280 is a wasteful number, since it uses less digits than its factorization.

655298280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 655298280 is about 25598.7945028667. The cubic root of 655298280 is about 868.5863685742.

The spelling of 655298280 in words is "six hundred fifty-five million, two hundred ninety-eight thousand, two hundred eighty".