655995340 has 288 divisors, whose sum is σ = 1956261888. Its totient is φ = 181440000.

The previous prime is 655995323. The next prime is 655995359. The reversal of 655995340 is 43599556.

655995340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×655995340² = 860659772203431200, which contains 22 as substring.

It is a congruent number.

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, 4344265 + ... + 4344415.

It is an arithmetic number, because the mean of its divisors is an integer number (6792576).

Almost surely, 2^655995340 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 655995340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978130944).

655995340 is an abundant number, since it is smaller than the sum of its proper divisors (1300266548).

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

655995340 is a wasteful number, since it uses less digits than its factorization.

655995340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 655995340 is about 25612.4059783535. The cubic root of 655995340 is about 868.8942397013.

The spelling of 655995340 in words is "six hundred fifty-five million, nine hundred ninety-five thousand, three hundred forty".