655299072 has 240 divisors, whose sum is σ = 2055493440. Its totient is φ = 208023552.

The previous prime is 655299019. The next prime is 655299077. The reversal of 655299072 is 270992556.

655299072 is a `hidden beast` number, since 6 + 552 + 9 + 90 + 7 + 2 = 666.

It is a super-2 number, since 2×655299072² = 858833747528122368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655299077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2861454 + ... + 2861682.

It is an arithmetic number, because the mean of its divisors is an integer number (8564556).

Almost surely, 2^655299072 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 655299072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027746720).

655299072 is an abundant number, since it is smaller than the sum of its proper divisors (1400194368).

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

655299072 is an equidigital number, since it uses as much as digits as its factorization.

655299072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 655299072 is about 25598.8099723405. The cubic root of 655299072 is about 868.5867185015.

The spelling of 655299072 in words is "six hundred fifty-five million, two hundred ninety-nine thousand, seventy-two".